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Fishdle learning library

Fish identification field guides

Meet the fish, not just the answer. Explore how fish look, live, feed, move, and matter; every profile pairs practical identification clues with ecology and a short knowledge check.

316 species

Browse safely—this library never reveals today's answer.

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Field notes

316 species found

Page 1 of 14
Salt water

Acanthuridae

Achilles tang

Acanthurus achilles
Habitat and range
Reef
Range
Pacific
Open learning profile
Salt water

Gadidae

Alaska pollock

Gadus chalcogrammus
Habitat and range
Open ocean
Range
North Pacific
Open learning profile
Salt water

Scombridae

Albacore tuna

Thunnus alalunga
Habitat and range
Open ocean
Range
Worldwide
Open learning profile
Fresh water

Lepisosteidae

Alligator gar

Atractosteus spatula
Habitat and range
River
Range
North America
Open learning profile
Mixed fresh and salt water

Anguillidae

American eel

Anguilla rostrata
Habitat and range
Estuary
Range
Atlantic
Open learning profile
Fresh water

Polyodontidae

American paddlefish

Polyodon spathula
Habitat and range
River
Range
North America
Open learning profile
Salt water

Ammodytidae

American sand lance

Ammodytes americanus
Habitat and range
coastal flats
Range
North Atlantic
Open learning profile
Fresh water

Arapaimidae

Arapaima

Arapaima gigas
Habitat and range
River
Range
South America
Open learning profile
Fresh water

Salmonidae

Arctic char

Salvelinus alpinus
Habitat and range
Lake
Range
Worldwide
Open learning profile
Fresh water

Salmonidae

Arctic grayling

Thymallus arcticus
Habitat and range
River
Range
Arctic
Open learning profile
Salt water

Istiophoridae

Atlantic blue marlin

Makaira nigricans
Habitat and range
Open ocean
Range
Atlantic
Open learning profile
Salt water

Scombridae

Atlantic bluefin tuna

Thunnus thynnus
Habitat and range
Open ocean
Range
Atlantic
Open learning profile
Salt water

Scombridae

Atlantic bonito

Sarda sarda
Habitat and range
Open ocean
Range
Atlantic
Open learning profile
Salt water

Gadidae

Atlantic cod

Gadus morhua
Habitat and range
Sea floor
Range
Atlantic
Open learning profile
Salt water

Exocoetidae

Atlantic flyingfish

Cheilopogon melanurus
Habitat and range
Open ocean
Range
Atlantic
Open learning profile
Salt water

Serranidae

Atlantic goliath grouper

Epinephelus itajara
Habitat and range
Reef
Range
Atlantic
Open learning profile
Salt water

Pleuronectidae

Atlantic halibut

Hippoglossus hippoglossus
Habitat and range
Sea floor
Range
North Atlantic
Open learning profile
Salt water

Clupeidae

Atlantic herring

Clupea harengus
Habitat and range
Open ocean
Range
North Atlantic
Open learning profile
Salt water

Scombridae

Atlantic mackerel

Scomber scombrus
Habitat and range
Open ocean
Range
Atlantic
Open learning profile
Fresh water

Salmonidae

Atlantic salmon

Salmo salar
Habitat and range
River
Range
Atlantic
Open learning profile
Mixed fresh and salt water

Megalopidae

Atlantic tarpon

Megalops atlanticus
Habitat and range
Coast
Range
Atlantic
Open learning profile
Salt water

Aulostomidae

Atlantic trumpetfish

Aulostomus maculatus
Habitat and range
Reef
Range
Atlantic
Open learning profile
Salt water

Anarhichadidae

Atlantic wolffish

Anarhichas lupus
Habitat and range
Sea floor
Range
Atlantic
Open learning profile
Fresh water

Neoceratodontidae

Australian lungfish

Neoceratodus forsteri
Habitat and range
River
Range
Australia
Open learning profile

Learn with purpose

A field guide you can grow through

  1. ObserveRead shape, color, size, and habitat before memorizing a name.
  2. ConnectSee how diet, behavior, and ecological role fit together.
  3. RecallUse each species knowledge check and save it to your learned list.

Start with Fish Identification 101 → · Read our editorial standards →