The dolphin is found in Atlantica in Kingdom Hearts and Kingdom Hearts II. The dolphin in the Undersea Valley is available even if there are.
Afterwards, return to the “Undersea Gorge” locate the dolphin swimming around. Examine it Kingdom Hearts Atlantica - Sora finds a Torn Page in Ariel's Grotto.
Kingdom: Animalia. Phylum: Chordata. Class: Mammalia. Order: Artiodactyla. Infraorder: Cetacea. Family: Delphinidae. Genus: Delphinus Linnaeus, Species. Delphinus capensis · Delphinus delphis. The common dolphin is the name given to two species (and possibly a third) of dolphin making Physical characteristics · Differentiating species · Natural history.