Seahorses have gills and swim bladders, but don't have vertical fins or typical fish tails. A seahorse's tail is long and resembles a snake. The Latin term for a seahorse is "hippocampus," which translates to "horse cate... More »

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A seahorse has a small, bony body, which is closely related to that of the pipefish. The most noticeable feature of a seahorse is its head, which strikes a resemblance to the long face of a horse, as described by HowStuf... More »

Octopuses, jellyfish, sharks, sea stars and sea turtles are a few of the numerous animal species that inhabit the oceans. Since most plants need sunlight to carry out photosynthesis, many underwater plants make their hom... More »

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Dolphins are very smart and playful animals. Although they live in the water, dolphins are mammals just like humans and need air to breathe, which they do out of a blowhole on the top of their heads. In fact, dolphins ca... More »

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Whales aren't fish, but mammals; they are warm-blooded, breathe air and nurse their babies with milk. Many species of whales grow very large; the blue whale can grow to over 90 feet long. Whales evolved from creatures th... More »

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Humpback whales can weigh as much as 48 tons and grow to approximately 40 to 50 feet in length. They are distinguished by the humps on their backs and their large flippers, which are approximately one-third of their over... More »

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Dolphins have great vision, although they can only see limited colors. They live in the water, but they do not drink from it. Instead, they get any necessary moisture from the food they eat. More »

www.reference.com Pets & Animals Marine Life