Seahorse
WordNet
noun
(1) Small fish with horselike heads bent sharply downward and curled tails; swim in upright position
(2) Either of two large northern marine mammals having ivory tusks and tough hide over thick blubber
WiktionaryText
Noun
- Any of various small marine fish of the genus Hippocampus that have a horselike head and swim upright.
- The walrus.