Noun
The walrus.
A fabulous creature, half horse and half fish, represented in classic mythology as driven by sea dogs or ridden by the Nereids. It is also depicted in heraldry. See Hippocampus.
Any fish of the genus Hippocampus.
Source: Webster's dictionarysea-horse
I have a birthmark on the inside of my left knee that resembles an upside-down sea horse. Gabourey Sidibe
Other ingredients include deer antlers, sea horse and sparrow brains. Source: Internet
So, for example you’d say a ship would be a sea horse, right, or something like that. Source: Internet