NASSAU GROUPER: ENDANGERED… AND PROTECTED


Nassau Grouper (Melinda Riger / Grand Bahamas Scuba)

NASSAU GROUPER: ENDANGERED… AND PROTECTED

Most creatures need some space for creative activity of one sort or another. Especially one particular sort, namely breeding. And for vulnerable and endangered species, this is especially important in order to maintain a sustainable population, and preferably to increase it year on year. Which is why there are closed seasons for certain fish, ensuring a time when they can be left alone to breed in peace and to perpetuate their species.

Nassau Grouper (Melinda Riger / Grand Bahamas Scuba)

The Nassau grouper Epinephelus striatus is just one of a number of grouper species that inhabit Bahamian waters. They are mostly found in the Northern Bahamas but only the Nassau grouper is on the IUCN Red List as an Endangered Species in need of protection.

Nassau Grouper (Melinda Riger / Grand Bahamas Scuba)

WHY ARE THESE FINE FISH ENDANGERED?

Sad to say, mankind is the main cause of the population fragility that has led to the official listing, and the imposition of a strict closed season for 3 months between December 1st and February 28th. Scientific studies have shown that commercial overfishing has reduced a thriving population to fewer than 10,000 mature fish. That may sound plenty to be going on with… until you consider that a net annual loss of only 10% would lead to extinction in a decade.

Nassau Grouper Infographic (Royal Defence Force)

10 CONVENIENTLY COLLECTED NASSAU GROUPER FACTS TO PONDER

  • An adult can grow to more than a metre long, and weigh 25 kg
  • They tend to be solitary daytime feeders, eating small fish & crustaceans
  • Their large mouths are use to ‘inhale’ or suck in prey
  • The colouring of an individual can vary from red to brown
  • These fish have little black spots around the eyes (I’ve no idea why).
  • Their habitat is in the vicinity of coral reefs, from shallows to 100 m deep
  • Spawning occurs in Dec & Jan during a full moon
  • Large numbers gather in a single location to mate in a mass spawning
  • These groupers are slow breeders, which compounds the overfishing problem
  • They are easy mass targets at spawning time; hence the need for a closed season

Nassau Grouper (Melinda Riger / Grand Bahamas Scuba)

Department of Fisheries information sheet (interesting if you have the time)

A Nassau Grouper glumly contemplates the possibility of extinctionNassau Grouper (Melinda Riger / Grand Bahamas Scuba)

RELATED POSTS

BLACK GROUPER

TIGER GROUPER

RED HIND

NASSAU GROUPER 1

CLEANING STATIONS

Nassau Grouper (Melinda Riger / . Grand Bahama Scuba)

Credits: all photos, Melinda Riger; Infographic by Royal Defence Force (tip o’ the  hat to Char Albury); Info Sheet, Dept of Fisheries