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Sea Urchin, radially symmetrical marine invertebrate. Sea urchins and near relatives, the sand dollars and heart urchins, belong to class Echinoidea of phylum Echinodermata.

Seabirds are those bird species which spend long periods away from land and obtain all or most of their food from the sea while flying, swimming or diving, and occupy all of the world's oceans.

Sponge (Porifera), phylum of bottom-dwelling, attached, aquatic organisms which, as adults, generate vigorous water currents through their porous bodies by action of internal fields of microscopic flagella (whiplike structures).

Starfish, or sea star, is a common marine animal found from seashore to ocean depths; 1600 species are known worldwide.

Sparrow is the name given to several unrelated groups of birds. Sparrows are classified in 3 families: Emberizidae, Estrildidae, and Passeridae.

 Squirrel, common name for family (Sciuridae) of rodents, comprising 262 species, found in North and South America, Eurasia and Africa.

Snail, common name for members of several groups of gastropod molluscs. Snails inhabit all moist habitats, but most forms are marine.

Squid are decapods ("10-footed") molluscs of class Cephalopoda. Squid are usually of the order Teuthoidea).

Snipe is the name given to 19 species of small to medium-sized shorebirds (254-406 mm) of the sandpiper family.

Stonefly is the common name for small to medium-sized, usually brown, aquatic insects of order Plecoptera.

The weasel is a small, long-bodied, carnivorous mammal of the family Mustelidae. Three species of weasels are found in Canada: the short-tailed weasel, also known as the ermine or stoat (Mustela erminea), the long-tailed weasel (Mustela frenata), and the least weasel (Mustela nivalis). The least weasel is the smallest species in the order carnivora. The genus Mustela also includes mink, black-footed ferret, and the introduced European ferret.

Thrashers (Mimidae) are a small family of slender, long-tailed, medium-sized, insectivorous and frugivorous birds with loud, musical, repetitive songs.

Swift is a common name for about 100 species of birds in 2 closely related families (Apodidae, Hemiprocnidae).

Trout is the common name given to the species of freshwater fish from 3 genera, all members of the salmon family (Salmonidae).

Waterfowl is a general term used for members of the family Anatidae, composed of closely allied species commonly known as ducks, geese and swans.

Waxwing is a family of birds comprising 8 species, including the true waxwings, the palmchat of Hispaniola and the silky-flycatchers of the southwestern US and Central America.

Starling is the common name for an Old World family (Sturnidae) of birds, comprising 114 principally tropical species.

The Wapiti (Cervus canadensis) is the second largest (after the moose), most highly evolved Old World deer. It is also known as the American elk.

Vole, common name for several rodents of family Muridae, found only in the northern hemisphere.

Wasp is a term applied to stinging insects in the division Aculeata of the order Hymenoptera, which also includes ants and bees.