Fish Encyclopedia
Search and identify 1,000+ fish species — freshwater, saltwater, reef, and pelagic — with habitat, size, diet, behavior, and how to tell them apart.
Black Sea Bass
A stocky, dark-bodied grouper relative common on rocky reefs and wrecks along the temperate western Atlantic coast, easily recognized by its high arched back and blunt head.
reef
Blue Tang
A vivid royal-blue reef fish with a black palette-shaped marking and a bright yellow tail, popularized worldwide after appearing in animated film.
reef
Bluehead Wrasse
A small, abundant Caribbean reef fish famous for changing color and sex as it matures, with terminal males developing a striking blue head and green body. It is one of the most numerous fish on western Atlantic reefs.
reef
Bluespotted Rabbitfish
A vividly colored rabbitfish with a yellow-orange body scattered with small electric-blue spots, commonly seen grazing coral-rich reef flats across the Indo-Pacific.
reef
Bar Jack
A sleek, blue-green jack with a dark stripe along its back and a black-and-white striped tail, common on Caribbean and western Atlantic reefs.
reef
Blackfin Clownfish
An orange anemonefish with a single white head bar and distinctive black-edged pelvic and anal fins, endemic to reefs around the Maldives and Sri Lanka.
reef
Blacktip Reef Shark
A slender, small reef shark instantly recognized by the bold black tips on all its fins, commonly seen patrolling shallow lagoons and reef flats across the Indo-Pacific.
reef
Blue Ring Angelfish
An Indo-Pacific angelfish named for the vivid blue ring behind its head, with adults displaying a yellow-brown body crossed by curving electric-blue lines.
reef
Bird Wrasse
An Indo-Pacific wrasse instantly recognized by its long, bird-like snout used to probe coral for prey.
reef
Blonde Naso Tang
A striking unicornfish with a gray body, black-and-yellow facial markings, and a bright yellow blaze along the back, best known in the aquarium trade as the Indian Ocean's 'blonde' color form.
reef
Blackbarred Halfbeak
A silvery halfbeak marked with faint dark vertical bars, common over seagrass beds and reef flats across the Indo-Pacific.
reef
Blue Damselfish
A small, brilliant electric-blue damselfish that fiercely defends its patch of shallow Indo-Pacific reef.
reef
Bluestriped Grunt
A vividly striped Caribbean reef fish with a bright yellow body crossed by narrow electric-blue lines, often seen in dense daytime schools beneath reef ledges.
reef
Bridled Burrfish
A small Caribbean burrfish with fixed, non-erectile spines and a pale body marked with fine dark reticulations and scattered blotches, often resting motionless among seagrass.
reef
Blue Green Chromis
A small schooling damselfish with iridescent blue-green coloring, commonly seen in large groups hovering above branching coral on Indo-Pacific reefs.
reef
Bluefin Trevally
A vividly colored reef jack covered in electric-blue spots, with matching blue fins, patrolling coral reefs across the Indo-Pacific.
reef
Blue Reef Chromis
A slender, brilliant blue schooling fish commonly seen hovering in large numbers above coral reef outcrops throughout the Caribbean and western Atlantic.
reef
Bluestripe Pipefish
The bluestripe pipefish is a tiny reef pipefish with a bright blue lateral stripe running along a tan or orange body, often seen hovering near crevices where it also cleans parasites from larger fish.
reef
Bigeye Trevally
A large, silvery-to-black reef jack famous for forming massive, swirling daytime schools around Indo-Pacific reef passes and drop-offs.
reef
Blue Devil Damselfish
A small, intensely electric-blue damselfish common on shallow Indo-Pacific reef flats, with males developing an orange-tinted tail during breeding season.
reef
Blackspotted Puffer
The Blackspotted Puffer, also called the dog-faced puffer, is a small reef pufferfish with a gray, yellow, or blue body scattered with a few large dark spots.
reef
Almaco Jack
A deep-bodied jack with a tall, strongly notched dorsal fin and elongated fin lobes, commonly found around tropical reefs and offshore structure.
reef
Bicolor Blenny
A small reef blenny sharply split into a dark front half and bright orange rear half, sheltering in rubble crevices.
reef
Banded Pipefish
The banded pipefish is a slender reef fish patterned with bold reddish-brown and white rings along its entire body, ending in a fan-shaped yellow tail fin marked with a dark spot.
reef
Barramundi Cod
The Australian common name for the panther grouper, a pale gray, black-spotted reef grouper instantly recognizable by its small head and steeply humped forehead.
reef
Bicolor Angelfish
A vivid dwarf angelfish split sharply into a bright yellow front half and deep blue rear half, a favorite of reef aquarists.
reefAnthias
A small, brightly colored basslet that forms large shimmering schools over reef drop-offs, feeding on drifting plankton.
reef
Barbour's Seahorse
A small, spiny-crowned seahorse native to the coral reefs and seagrass beds of the western Pacific, distinguished by fine dark banding along its snout.
reef
Bicolor Anthias
A small Indo-Pacific reef fish sharply divided in color, with a violet-purple front half and a golden-yellow rear half, forming loose groups above reef structure.
reef
Banded Butterflyfish
A white Caribbean butterflyfish crossed by bold black vertical bands, including one masking the eye.
reef
Bicolor Damselfish
A small reef fish sharply split into a dark front half and a pale rear half, common on Caribbean and western Atlantic coral reefs where it defends algae-covered territories.
reef
Banggai Cardinalfish
The Banggai Cardinalfish is a striking silver-and-black fish with long trailing fins and bold white spots, native to a tiny area of Indonesia and listed as Endangered in the wild.
reef
Amberjack
A powerful, deep-bodied jack that patrols reefs and wrecks worldwide in warm seas, known for its stubborn fighting strength and amber-tinted flanks.
reef
Barracuda
A large, torpedo-shaped predatory fish found around tropical reefs, seagrass beds, and open coastal waters worldwide, easily identified by its underbite jaw and fang-like teeth.
reef
Aiptasia-eating Filefish
A small, drab Indo-Pacific filefish prized in reef aquariums for its habit of eating Aiptasia glass anemones, blending into seagrass and algae with mottled camouflage.
reef
Allen's Damselfish
A slender, iridescent blue damselfish with a bright yellow tail, native to reefs of the Coral Triangle and known for its striking two-tone coloration.
reef
Achilles Tang
A striking black surgeonfish with a bold orange-red teardrop marking near its tail and matching scalpel-like tail spine. It inhabits high-surf reef zones across the Pacific.
reef
Azure Damselfish
A small, vividly blue damselfish common on Indo-Pacific reef flats and lagoons, easily spotted flitting among coral rubble in loose groups.
reef
Balloonfish
The balloonfish is a spine-covered porcupinefish that inflates by gulping water when threatened, using its beak-like teeth to crush hard-shelled prey on tropical reefs.
reef
Auriga Butterflyfish
A very common Indo-Pacific butterflyfish with cross-hatched white body, yellow rear, and often a trailing dorsal filament.
reef