Home › Actinopterygii › Serranidae › Nassau Grouper (Epinephelus striatus)

SPECIES PROFILE

Nassau Grouper (Epinephelus striatus)

Epinephelus

IUCN STATUS

Critically Endangered

Nassau Grouper (Epinephelus striatus) — Bermuda, Bahamas, Caribbean, and Florida; historically one of the most abundant Caribbean reef fish.

CONSERVATION STATUS

Critically Endangered

CLASS

Actinopterygii

GEOGRAPHICAL RANGE

Bermuda, Bahamas, Caribbean, and Florida; historically one of the most abundant Caribbean reef fish.

DIET

Carnivore

HABITAT

Coral reef ecosystems from shallow nearshore areas to 90 m depth; associated with structurally complex reef habitats.

🔬 Classification

PHYLUM

Chordata

CLASS

Actinopterygii

ORDER

Perciformes

FAMILY

Serranidae

GENUS

Epinephelus

📋 Description

SIZE

Large reef fish; up to 1.2 m long; weighs up to 25 kg; robust oval body.

COLORATION

White base colour with brown vertical bars and blotches; black-spotted pattern behind head; bicolor tail.

ADAPTATIONS

Can change colour pattern rapidly for camouflage; solitary ambush predator with a large expandable mouth for suction-feeding.

🌿 Ecology

HABITAT

Coral reef ecosystems from shallow nearshore areas to 90 m depth; associated with structurally complex reef habitats.

DIET

Carnivore

GEOGRAPHIC RANGE

Bermuda, Bahamas, Caribbean, and Florida; historically one of the most abundant Caribbean reef fish.

REPRODUCTION

Sequential hermaphrodite — born female, can change to male; spawning aggregations of thousands form at specific full-moon sites.

DIET DETAILS

Fish, octopus, crustaceans, and other reef invertebrates; ambush predator; forms spectacular spawning aggregations.

⚠️ Threats & Conservation

PRIMARY THREATS

Overfishing at predictable spawning aggregations has reduced populations 60–80% across the Caribbean; Bahamas remains a stronghold.

💡 Interesting Facts

1

Nassau Grouper form some of the last large spawning aggregations remaining in the Caribbean at a handful of Bahamian sites.

2

They are sequential hermaphrodites — all groupers begin life female; dominant individuals transition to male.

🔭 Sighting Guide

📍 BEST PLACES TO SIGHT

Spawning aggregation site at Exuma Sound, Bahamas — December–February full moon dives encounter hundreds of spawning Nassau Grouper.

Andros Barrier Reef dive sites, Bahamas — the third-largest reef in the world with healthy Nassau Grouper populations year-round.

Eleuthera reef wall dive sites, Bahamas — outer reef drop-offs with resident Nassau Grouper viewable on recreational reef dives.

🗓️ BEST TIME TO SIGHT

Dive at Exuma Cays or Andros outer reef walls December–February during spawning aggregations — a once-in-a-lifetime spectacle.

🎯 SIGHTING TIPS

Year-round on Bahamian reefs; winter spawning aggregations (December–February) at full moon are peak events with thousands of fish.