SEA BISCUITS: THEY REALLY DO CONTAIN DOVES – AND MORE!


Sea Biscuit Close-up, Abaco (Keith Salvesen)

SEA BISCUITS: THEY REALLY DO CONTAIN DOVES – AND MORE!

Recently I posed the question whether sea biscuits, like sand dollars contain ‘doves’. I had one in my hand, it rattled, I took a photograph through its ‘mouth hole’ and the question was answered. Biscuits do indeed contain doves – see HERE for details and comparisons with dollar doves.

Sea Biscuit 'Doves', Abaco (Keith Salvesen)

However, I spinelessly* failed to break open the biscuit to check out the contents more closely. I theorised that, because of the 5-way symmetry of these creatures, there would be 5 doves (which are in fact segmented mouth parts) in a biscuit exactly as with a dollar, and amiably challenged anyone to disprove it. [* biscuits and dollars are types of sea urchin – see what I did there?]

Dollar dove in close-up – one of 5 segmented mouth parts inside the ‘test’ (skeleton)Sand Dollar 'Doves', Abaco (Keith Salvesen)

Melissa Ann Guinness from Hope Town has a far more robust attitude to these things and, taking up the challenge, she heartlessly smashed open a sea biscuit from her collection to investigate further. I said I’d publish a correction if my theory was wrong. This is it – though in one arguable sense the theory holds good. It just didn’t go far enough…

Sea Biscuit 'Doves', Abaco (Melissa Ann Guinness)

In the above picture you can see (a) 4 quarters of a sea biscuit skeleton (b) 10 demi-doves (rather than 5 whole doves) and (c) a small mummified 5-limbed brittle star that was presumably in the creature’s digestive system when it died.

10 ‘demi-doves’  (or, when assembled, 5 doves that (unlike sand dollars) are in 2 parts
Sea Biscuit 'Doves', Abaco (Melissa Ann Guinness)

Complete doves

Sea Biscuit 'Doves', Abaco (Melissa Ann Guinness) Sea Biscuit 'Doves', Abaco (Melissa Ann Guinness) Sea Biscuit 'Doves', Abaco (Melissa Ann Guinness)

The final reconstruction – 5 doves and a bonus brittle star

Sea Biscuit 'Doves', Abaco (Keith Salvesen)

Photo Credits: Keith Salvesen (1, 2, 3, 10); Melissa Ann Guinness (4, 5, 6, ,7 ,8 ,9)

SEA BISCUITS: DO THEY REALLY CONTAIN DOVES?


Sea Biscuits, Delphi, Abaco (Clare Latimer)

Sea Biscuits on the Beach, Delphi, Abaco Bahamas

SEA BISCUITS: DO THEY REALLY CONTAIN DOVES?

A couple of years ago I wrote a post called ECHINODERMS, DOLLAR DOVES & PETRIFIED BISCUITS. It dealt with the… fact? rumour? old wive’s tale?… that within each sand dollar test (i.e. the white skeleton) are hidden 5 ‘doves’. You can hear them rattling inside if you shake the dollar… 

Sand Dollar Doves (Keith Salvesen) 6

Sand Dollar from Abaco containing 5 miniature white doves…

I investigated the theory with senior granddaughter, and we broke a sand dollar in half. And as you can see, the answer was undoubtedly yes – there were 5 tiny white doves, thus fulfilling the prediction of the famous ‘Sand Dollar’ poem that contains the lines  “Now break the centre open And here you will release The five white doves awaiting To spread good will and peace”.

Five white doves (in fact, the separated parts of the creature’s feeding apparatus)Sand Dollar Doves (Keith Salvesen) 1

A single dove, a picture of dovelinessSand Dollar Doves (Keith Salvesen) 3

I never thought to extend the experiment to sea biscuits, another object prized by beachcombers. All that changed last month when I picked up a sea biscuit and found that it, too, rattled.

A rattling good sea biscuit

So I turned it over to take a closer look at the underside. And there, unmistakably, was the source of the rattle – some kind of internal arrangement inside the feeding  hole (let us not pause overlong to consider the purpose of the other hole). But it wasn’t conclusively a dove.

So I shook it around a bit (sorry, doves) and zoomed in. And there was a small white columbine-type contraption remarkably similar to those found in the dollar dove. And no, I did not smash open the sea biscuit (it wasn’t actually mine). And no, I didn’t doubt any longer that sea biscuits also contain doves.

SO WILL THERE BE 5 DOVES, LIKE WITH THE DOLLARS?

I predict there will also be five. Both dollars and biscuits have ‘five-way symmetry’ (look on the topside of a biscuit or dollar to see how); and so the mouth (from which the ‘doves’ derive) will have a single part for each of the five sectors, all linked. 

If anyone would like to smash up one of their precious beach finds and test the theory, please feel free. Prove me wrong… and I’ll publish a correction! [Photo please…]

All photos Keith Salvesen except Header, Clare Latimer at Delphi

SEA GLASS TREASURES & TWO ISLAND CHICKS…


Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)

SEA GLASS TREASURES & TWO ISLAND CHICKS…

It’s time to shine the Rolling Harbour spotlight on sea glass, a neglected (by me) topic recently . Everyone loves it (don’t they?), and there’s always a bit of excitement in finding a pretty piece of cloudy glass gleaming in the sand on the beach. Just look at that colour. Might it be rare? How old could it be? Should I pick it up or leave it for someone else to enjoy? 

Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)

Collecting sea glass is one of the pleasures of a walk on the beach. Or maybe it’s the motivation for the walk. For some, it is an opportunity to turn what the sea throws onto the beach into something decorative. Abaco is home to some excellent jewellery** makers who specialise in using locally found materials to make beautiful things. These sometimes incorporate a mix of sea glass, pebbles, and small shells.

Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)

In Hopetown on Elbow Cay, Hilary Thompson and Erika Feszt Russell do just that. Trading under the name ‘Two Island Chicks’, they use sea glass in many of their creations, some examples of which are displayed here. As you’ll see, they also apply their creativity to showing their jewellery attractively. 

Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)

The collected glass has to be sorted into the various colours. Most are quite common (white, green, brown), some are uncommon (eg cobalt blue), and just a few that are very rare – and possibly valuable (red, orange) – see charts below.

Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)

The charts below give a general overview of the comparative rarity of various sea glass colours, their sources, and the chances of making a rare find. Of course, these are mainstream colours; there are many other in-between hues and shades.

Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)

Can you spot the most unusual piece of sea glass here?Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)

Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks) Sea Glass & Jewellery, Abaco, Bahamas (Two Island Chicks)

RELATED POSTS

BEACHCOMBING FOR SEA GLASS with Kasia

BOOKCOMBING: SEA GLASS BOOKS (4 books compared)

ABACO ARTS & CRAFTS (with drop-down menus)

** Yeah yeah, I hear you. Jewellery? How English is that? Please mentally substitute ‘jewelry’ throughout. Maybe the same for colour / color. This is a bi-lingual area.

THE TWO ISLAND CHICKS

Credits: Hilary and Erika for all the photos; as for the sea glass charts (1) West Coast Sea Glass 2006 (as found in a number of online sources); (2) Origin unknown (ditto re online sources) 

“THE ADMIRABLE CHITON” (A DELPHI BEACH MYSTERY)


Fuzzy Chiton, Delphi, Abaco (Kasia Reid)

“THE ADMIRABLE CHITON” (A DELPHI BEACH MYSTERY)

The beach at Delphi is good for combing. Most of Abaco’s beaches are too, for that matter. You can find Kasia’s beachcombing page HERE. Last month 2 guests, Linda and Jan, went exploring on the beach and returned with a handful of mystery items they had found under the clumps of seaweed. These were clearly neither complete nor broken shells, and even after some research in books and online I remained baffled. They were obviously parts of some water-based species… but what parts, anatomically speaking? And what species?

Fuzzy Chiton valves (segments), Delphi Beach, Abaco, Bahamas

So I contacted Colin Redfern, Bahamian sea shell expert and author of a magisterial tome on the subject. His response was typically swift and definitive: 

The ladies have found some beach-worn valves from the common Fuzzy chiton, which was so nicely photographed by Kasia on your April 12, 2012 entry – (the one that included fecal pellets) [See Header]. As you know, the meat from this species is eaten by Bahamians, who discard the unwanted shell. The individual plates then become separated by wave action and normal deterioration. Abaco has a pretty good selection of chiton species, and individual valves from some of the other species are sometimes found on beaches.
Fuzzy Chiton, wiki

Chitons (pron. kytens) are marine molluscs with a great many species worldwide, from very small to quite large. Their shell comprises 8 interlocking and overlapping curved plates known as ‘valves’ that provide a flexible protection, and articulate as the creature moves. Chitons – at least some species – can even curl up into a protective ball. The plates are held together by a ‘girdle’ surrounding the animal.

Acanthopleura_granulata_(West_Indian_fuzzy_chitons)_(San_Salvador_Island,_Bahamas) James St. John

Fossil records show that these primitive-looking animals derive from the Devonian period – or even Ordovician. They remind me of trilobites, even older creatures from the Cambrian period that used to fascinate me at school when I was small and paying attention. The name chiton derives from Latin word for mollusc, which itself comes from an older Greek word meaning a tunic. Which they in no way resemble.

Fuzzy Chiton, Abaco (Kasia Reid)

After a chiton dies, the valves which make up the eight-part shell come apart because the girdle no longer holds them together and these the plates may wash up in beach drift, to be found by Linda and Jan. The individual shell plates are sometimes known as “butterfly shells” due to their shape.

A DOZEN CHITON FACT TO AMAZE YOUR FRIENDS WITH

  • Chitons are also known as ‘sea cradles’ or ‘coat-of-mail shells
  • Their shell consists of 8 plates / valves so flexible that they can even curl into a ball
  • They move with a muscular ‘foot’, and use it to cling onto rocks like a limpet
  • They have no definable head, no tail and no eyes, onlyphotoreceptor cell clusters’
  • The mouth on on the underside of the chiton
  • It contains a sort of tongue – a radula – with rows of teeth, each with 17 (why 17?)
  • They use the radula to scrape the rock substrate for algae and similar
  • A chiton’s digestive system produces neat little fecal packages like white pills
  • Its anus is next to its foot, a design mercifully not found in humans
  • I learn that chitons “lack a cerebral ganglion”. I think this means, no brain as such
  • However they do have a primitive ‘homing’ ability too complex to summarise…
  • Chitons are eaten by people mainly in the West Indies and the Philippines

Chiton, Abaco 2 (Kasia Reid)

WHAT? YOU CAN EAT THEM?**

If you are asking that question, you perhaps read right through the 12 facts to the very last one. If so, you deserve an answer and indeed a recipe for Chitons aka ‘Sea Cockroaches’. And who better to provide it than the brilliantly-named PSYKDELIASMITH Click the link to find out more.

**CAUTION As a couple of people have rightly pointed out (thanks Liann and Julias) since I posted this, not all chitons are edible. Some are poisonous. So before you think of a culinary chiton caper, best check that you have got an edible one

A chiton on the move, very slowly, and apparently halted by an encounter with a nerite

wp809b3177_06

Colin Redfern kindly sent me a pdf of the chiton section of his book. Of the fuzzy chiton he writes: “Occurrence: Very common intertidally on rocky shorelines. Known locally as a Curb, with the meaty foot used as an alternative to conch in salads. Gutted specimens or disarticulated valves consequently common along shorelines.” Which is just where this post began.

FUZZY CHITON scientific doc (Colin Redfern)

And if you want to know about the title and its link to Peter Pan, click THE ADMIRABLE CRICHTON

POST SCRIPT This post has generated quite a lot of comment on Facebook. Here are a few, plus an amazing discovery in Hope Town
  • “Commonly know as a curb, they are edible (raw) you make a salad like you do with conch , delicious !!!” (Rosalie Pyfrom)
  • True some are poisonous, but your have to know which ones!! I was showed as a child which were good from bad!!” (Janice Carey Hall) 
  •  “Very delicious” (Cantrell Walker)
  • “Lets not forget the poisonous ones!” (Julias Sawyer)
  •  “Don’t mess wit my curbs, nom nom”  + “Definitely do NOT eat the very large ones with the bumpy rim”.(Liann Key Kaighin)
  • “Curb stew is a Bahamian food that has since the loyalist arrived” (Steve Roessler)
 Gary Richardson Jr.'s photo.

Then Gary Richardson Jr added a photo of what must be a pearl, found in a curb in Hope Town. 

 To which I replied “Well that’s a surprise! Interesting find. Did a bit of research. Apparently all shelled molluscs are capable of producing ‘pearls’ – though they have no value. So this must be a chiton pearl…”
Credits: Linda & Jan for their beachcombing finds; Colin Redfern for his ID & info enabling this post (and his continuing interest); Kasia Reid; Hans Hillewaert & James St John (wiki uploads)

ROLLING HARBOUR, ABACO: LIFE’S A BEACH & THEN SOME…


Rolling Harbour Beach, Abaco1b

ROLLING HARBOUR, ABACO: LIFE’S A BEACH & THEN SOME…

Rolling Harbour (the geographical feature) is a gently curving one-mile white sand bay presided over by the Delphi Club, which sits on a 50 foot cliff behind the beach. There are rocks at either end, fish in the sea (including bonefish and, in the right conditions, permit), birds on the shore and shells on the sand. And that’s it… 

Rolling Harbour Beach, Abaco2bRolling Harbour Beach, Abaco3bRolling Harbour Beach, Abaco4bRolling Harbour Beach, Abaco5bRolling Harbour Beach, Abaco6bRolling Harbour Beach, Abaco7bRolling Harbour Beach, Abaco8b

And if anyone can explain the strange ribbed sky effect that seems to have appeared from nowhere when I posted these photos that I took last year (300dpi), then I’d be very grateful…

SMALL SHELLS FROM CASUARINA, ABACO


Abaco Shell 3b

SMALL SHELLS FROM CASUARINA, ABACO

Abaco Shell 1Abaco Shell 4Abaco Shell 2Abaco Shell 5Abaco Shell 6

The shell species below (also in the header picture) is an olive. It turns out to have potential to star in a small maritime horror movie. Capt Rick Guest, who kindly keeps an eye on my shell and other sea-related posts, writes “Interestingly, the previous occupant of the first and last shell pictured here is a major predator of the other Bivalve shells shown. The Olive shell hides under the sand by day, then emerges at night to feast upon small Bivalves, and any other available prey. One can often trace the nocturnal trails of this Olive shell in sand on calm mornings with mask and snorkel, and thrust a hand under a trails end for this fellow. When kept in an aquarium, they will consume any meat offered.” “Olive and Let Die”, maybe?Abaco Shell 3aAbaco Shell 7

SHORE THINGS: BEACHCOMBING ON A PRISTINE ABACO BEACH


Shore Things 16

SHORE THINGS: BEACHCOMBING ON A PRISTINE ABACO BEACH

The Abaco bay known as Rolling Harbour is a 3/4 mile curve of white sand beach, protected by an off-shore reef. The beach is pristine. Or it would be but for two factors. One is the seaweed that arrives when the wind is from the east – natural and biodegradable detritus. It provides food and camouflage for many species of shorebird – plover and sandpipers of all varieties from large to least. The second – far less easily dealt with – is the inevitable plastic junk washed up on every tide. This has to be collected up and ‘binned’, a never-ending cycle of plastic trash disposal. Except for the ATLAS V SPACE-ROCKET FAIRING found on the beach, that came from the Mars ‘Curiosity’ launch. Sandy's Mystery Object

We kept is as a… curiosity, until it was eventually removed by the men in black…

Shore Things 14I’d intended to have a ‘plastic beach trash’, Atlantic-gyre-rage rant, with angry / sad photos to match. Instead, I decided to illustrate a more positive side to beach life – things you may discover when you take a closer look at the sand under your feet. Like the coconut above. Many of these photos were taken by our friend Clare Latimer (to whom thanks for use permission); some by me.

Shore Things 13A LONE FLOWERShore Things 17SEA STAR (DEFUNCT), WITH CRAB TRACKSShore Things 21SEA FAN (GORGONIAN)Shore Things 15WASHED-UP BOTTLE (PROBABLY NOT RUM)Shore Things 12

SEA BISCUITSShore Things 9

Thanks to Capt Rick Guest, who has contributed an interesting comment regarding the sea biscuit with a hole in it. He writes “the (Meoma) Sea Biscuit w/ the hole in it was dined upon by a Helmet Conch. The Cassis madagascariensis, or C.tuberosa drills the hole w/ its conveyer-belt-like radula teeth w/ some help from its acidic, saliva. Probably 98% of all symetrical holes in marine invertebrates are of this nature. Murex, Naticas, Helmets, and many Cephalapods (via a Stylet), are the usual B&E suspects. The Cone shells utilize a modified radula in the form of a harpoon which is attached to a venom tube.” For more on the vicious cone shell, and other creatures to avoid, click HERE

DRIFTWOOD. IT’S LIKE… OH, USE YOUR IMAGINATIONShore Things 5A WILSON’S PLOVER NESTShore Things 11HORSESHOE CRAB (LIMULUS)Shore Things 4SCULPTURE? AN EMBRYONIC SHELTER? Shore Things 3LARGE BIRD FOOTPRINTSShore Things 18MORE BIRD PRINTS AND CRAB TRACKSShore Things 19 CRABUS CUTICUSShore Things 6CONCH SHELLS & OTHER BEACH TREASURESShore Things 8Shore Things 20CRAB HOLE & TRACKSShore Things 22SOME IDIOT’S LEFT HIS… OH! IT’S MINEShore Things 7