swim

Trout swimming Salmo trutta seen from above on a sandy river bottom, demonstrating carangiform movement

Tiger Panthera tigris portrait of a head sketch

Red squirrel Sciurus vulgaris cut to white, sitting

Pere David deer Elaphurus davidianus

North American Mink Neovison vison lying down, in profile

Pen and ink drawing of the footprints and tracks of the North American Mink Neovison vison

Pen and ink illustration of the Crested porcupine Hystrix cristata looking sideways at the viewer, cut to white

Samon Salmo salar hen fish showing silvery irridescence

Samon Salmo salar with watery background

Samon Salmo salar hen, cock, parr, and smolt stages with text

Samon Salmo salar parr with distinctive markings and red dots

Samon Salmo salar smolt showing silvery young fish

Sandbar shark Carcharhinus plumbeus

Sandtiger shark Carcharias Taurus

Seahorse family diagram showing pipefish, leafy seadragon, and other syngnathidae

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

Zebra shark Stegostoma fasciatum

Rudd Scardinius erythropthalmus

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

Atlantic stingray Dasyatis sabina view from above and from below