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Fish, any of approximately 34,000 species of vertebrate animals (phylum Chordata) found in the fresh and salt waters of the world. Living species range from the primitive jawless lampreys and hagfishes through the cartilaginous sharks, skates, and rays to the abundant and diverse bony fishes.

Ice melting

Fish - Digestion, Anatomy, Nutrition

How snow crystals are formed illustrated

fish - Students, Britannica Kids

Fish - Gills, Lungs, Swim Bladder

Divers Film Extremely Rare Encounter With 'Earthquake Fish

Deep-Sea Seadevil Voted One of the 'Ugliest' Fish in the Sea

Curious Kids: how do fish sleep?

smartpond® Backyard Blog – Why are my fish constantly at the surface?

Eastern spiny gurnard a noisy - Australian Geographic