Fish Identification Chart with Pictures: 40 Species by Habitat

How to use this fish identification chart

1. Pick the habitat first. Use the All / Saltwater / Freshwater / Reef buttons above the chart. Habitat rules out more species than any single body feature, so it is the fastest first cut.
2. Compare the picture, then the traits. Colour photos are the quickest match, but colour changes with age, sex, water and death (a mahi-mahi fades in minutes). The Key ID Traits column lists shape, fin and marking features that do not change.
3. Check size and range. A fish outside its normal size range or thousands of miles from its distribution is usually a different species that looks similar.
4. Still torn between two rows? Upload the photo to the AI fish identifier and it returns the top matches with a confidence score.

Deeper charts by habitat

Interactive fish identification chart: 40 species with pictures

Photo	Species	Habitat	Size Range	Key ID Traits	Distribution
	Clownfish Amphiprioninae	🐠 Reef	7–15 cm	Orange with white bars edged in black; lives in anemones	Indo-Pacific
	Blue Tang Acanthurus coeruleus	🐠 Reef	20–30 cm	Bright blue; yellow spine at tail base; juveniles are yellow	Atlantic / Caribbean
	Moorish Idol Zanclus cornutus	🐠 Reef	15–20 cm	Black, white & yellow bands; extremely long dorsal filament	Indo-Pacific, Hawaii
	Lionfish Pterois volitans	🐠 Reef	25–38 cm	Red-white stripes; feathery pectoral fins; venomous spines	Indo-Pacific (invasive Atlantic)
	Parrotfish Scarus spp.	🐠 Reef	30–120 cm	Beak-like fused teeth; vivid blues, greens, pinks	Tropical worldwide
	Queen Angelfish Holacanthus ciliaris	🐠 Reef	30–45 cm	Electric blue-yellow; blue crown spot on forehead	Caribbean
	Titan Triggerfish Balistoides viridescens	🐠 Reef	50–75 cm	Mottled brown-green; large; will defend nest aggressively	Indo-Pacific
	Napoleon Wrasse Cheilinus undulatus	🐠 Reef	60–230 cm	Distinctive forehead hump in adults; blue-green; endangered	Indo-Pacific
	Spotted Pufferfish Arothron meleagris	🐠 Reef	30–50 cm	Dark brown covered in white spots; inflates when threatened	Indo-Pacific
	Copperband Butterflyfish Chelmon rostratus	🐠 Reef	15–20 cm	White with copper vertical bands; long pointed snout	Indo-Pacific
	Atlantic Bluefin Tuna Thunnus thynnus	🌊 Saltwater	100–300 cm	Steel-blue back; silver belly; short pectoral fins; crescent tail	N. Atlantic, Mediterranean
	Mahi-Mahi Coryphaena hippurus	🌊 Saltwater	60–150 cm	Vivid blue-green-gold; blunt forehead in males; rapidly fades after death	Tropical worldwide
	Wahoo Acanthocybium solandri	🌊 Saltwater	100–210 cm	Elongated; blue-grey with faint vertical bars; knife-like teeth	Tropical worldwide
	Red Snapper Lutjanus campechanus	🌊 Saltwater	40–100 cm	Rose-red; pointed anal fin; large eye with red iris	W. Atlantic, Gulf of Mexico
	Barracuda Sphyraena barracuda	🌊 Saltwater	60–200 cm	Long cylindrical; silver with dark blotches; fang-like teeth	Tropical worldwide
	Tarpon Megalops atlanticus	🌊 Saltwater	100–250 cm	Very large silver scales; upturned mouth; bony gular plate	Atlantic, Caribbean
	Cobia Rachycentron canadum	🌊 Saltwater	60–200 cm	Dark brown; white belly; distinct lateral stripe; flat head	Atlantic, Indo-Pacific
	Snook Centropomus undecimalis	🌊 Saltwater	40–140 cm	Prominent black lateral line; protruding lower jaw; silver	Tropical Atlantic
	Redfish (Red Drum) Sciaenops ocellatus	🌊 Saltwater	40–160 cm	Copper-bronze; one or more black spots at tail base	W. Atlantic, Gulf of Mexico
	Grouper (Goliath) Epinephelus itajara	🌊 Saltwater	100–250 cm	Brownish with dark spots; massive; can exceed 400 kg	Atlantic, E. Pacific
	Largemouth Bass Micropterus salmoides	🏞 Freshwater	25–75 cm	Dark lateral stripe; jaw extends past rear of eye	N. America (introduced worldwide)
	Chinook Salmon Oncorhynchus tshawytscha	🏞 Freshwater	60–150 cm	Black spots on back and both tail lobes; black gum line	N. Pacific, introduced elsewhere
	Rainbow Trout Oncorhynchus mykiss	🏞 Freshwater	20–120 cm	Pink lateral stripe; black spots on body and fins	N. America, introduced worldwide
	Northern Pike Esox lucius	🏞 Freshwater	40–150 cm	Long body; duck-like snout; light bean-shaped spots on dark green	N. America, Europe, Asia
	Common Carp Cyprinus carpio	🏞 Freshwater	30–120 cm	Bronzy-gold; two pairs of barbels; large scales; dorsal spine	Worldwide (introduced)
	Walleye Sander vitreus	🏞 Freshwater	35–90 cm	Glassy opaque eyes (tapetum lucidum); olive-gold; white tail tip	N. America
	Bluegill Lepomis macrochirus	🏞 Freshwater	10–30 cm	Deep blue-black ear flap; vertical bars; orange breast in males	N. America (introduced elsewhere)
	Channel Catfish Ictalurus punctatus	🏞 Freshwater	30–100 cm	Deeply forked tail; scattered dark spots; long barbels	N. America
	Murray Cod Maccullochella peelii	🏞 Freshwater	50–180 cm	Green with dark blotches; large mouth; Australia's largest freshwater fish	SE Australia
	Peacock Bass Cichla ocellaris	🏞 Freshwater	30–75 cm	Gold-green with three dark vertical bars; distinctive ocellus (eye-spot) at tail	S. America (introduced Florida)
	Brown Trout Salmo trutta	🏞 Freshwater	25–100 cm	Brown with black and red spots; red spots often with pale halos	Europe (introduced worldwide)
	Bream (Abramis) Abramis brama	🏞 Freshwater	20–60 cm	Deep, laterally compressed; bronze-silver; long anal fin	Europe
	Tigerfish Hydrocynus vittatus	🏞 Freshwater	40–100 cm	Silver with dark horizontal stripes; large, interlocking fang-like teeth	Sub-Saharan Africa
	Arapaima Arapaima gigas	🏞 Freshwater	100–300 cm	Massive; dark grey-green with red-orange accents near tail; must breathe air	Amazon basin
	Barramundi Lates calcarifer	🏞 Freshwater	40–180 cm	Silver-white; large concave tail; steep head profile; red eye	Australia, SE Asia
	Amberjack Seriola dumerili	🌊 Saltwater	60–200 cm	Amber lateral stripe from eye to tail; dark dorsal, silver sides	Tropical/subtropical worldwide
	King Mackerel Scomberomorus cavalla	🌊 Saltwater	50–185 cm	Silver; lateral line dips sharply at mid-body; iridescent green back	W. Atlantic, Gulf of Mexico
	Bonefish Albula vulpes	🌊 Saltwater	40–90 cm	Extremely silvery; almost transparent; pointed snout; tails in shallow flats	Tropical worldwide
	Yellowfin Tuna Thunnus albacares	🌊 Saltwater	80–200 cm	Bright yellow fins and finlets; streamlined; deeply forked tail	Tropical worldwide
	Harlequin Tuskfish Choerodon fasciatus	🐠 Reef	20–30 cm	Vivid blue, orange, and black banding; protruding blue tusk-like canines	W. Pacific, GBR

Species photos are CC-licensed or public-domain images from Wikimedia Commons; see the full image credits for each file and its licence.

Reading the chart when a fish does not match

Most misidentifications on a chart come from three things. Juveniles often wear different colours from adults (a blue tang starts life bright yellow). Regional forms of the same species vary, so treat the picture as a typical example, not a template. And dead fish lose colour: if you are identifying a catch on the dock, lean on body shape, fin shape, tooth pattern and lateral-line markings rather than hue. When two rows still fit, the AI identifier compares hundreds of features at once and is the quicker tie-breaker.

Fish identification chart FAQ

Does this chart cover aquarium fish?

This master chart is built around commonly caught and commonly seen wild species. For tank fish, the FishCare AI species database covers 250+ aquarium species with care parameters, and the photo identifier recognises both wild and aquarium fish.

Can I print the fish identification chart?

Yes. Pick a habitat filter, then print the page; the table keeps its photo, species, size and traits columns on paper. For a pocket reference on a boat, the freshwater and saltwater charts are shorter and print on fewer pages.

Which is more reliable, a chart or an AI identifier?

They answer different questions. A chart teaches you what to look at and works with no signal. The AI identifier is faster and better at separating close look-alikes, but it needs a clear side-on photo. Use the chart to narrow, the identifier to confirm.