vertebrate

Siamese fighting fish Betta splendens battling

Stone fish Synanceia verrucosa camoflauged with its background

Striped bass Morone saxatilis

Three-spined stickleback Gasterosteus aculeatus male

Three-spined stickleback Gasterosteus aculeatus male with background weed

Fishing net pingers shown on nets in the sea deterring dolphins (but not fish)

Grayling Thymallus thymallus

Northern pike Esox lucius lurking with background of weeds

Brown trout Salmo trutta from chalk stream (with red spots)

Brown trout Salmo trutta view from above showing swimming motion with background of weeds and pebbles

Common bream Abramis brama

Common carp Cyprinus carpio

Common roach Rutilus rutilus

Comparison of the teeth of different shark species including megalodon, great white, sandtiger, brown, cow, nurse, zebra, and sharpnose shark

Diagram of different simplified fish shapes

Diagram of fishing methods

Eel Anguilla anguilla swimming with weed and background

European bullhead Cottus gobio with background

Fish anatomy diagram simplified exterior and interior cross section view

Fish scales used to age a fish with zoom in annuli of fish scales

Willow tit Poecile montanus perched on a lichen covered branch

Wren Troglodytes troglodytes by its round nest in a woodland scene with ivy leaves and a suggestion of greenery behind

Wren Troglodytes troglodytes perched on a branch cut to whtie

Yellowhammer Emberiza citrinella perched on a twig