Answer:

seahorse

Answer	Crossword Clue
SEAHORSE	Neptune's mount?
SEAHORSE	Coral reef inhabitant
SEAHORSE	Fish that swims upright

SEAHORSE	Fish with a prehensile tail
SEAHORSE	Pipefish cousin
SEAHORSE	Fish that swims in an upright position
SEAHORSE	It's not an equine
SEAHORSE	Equine-like fish
SEAHORSE	Little fish
SEAHORSE	Aquarium creature
SEAHORSE	Aquarium critter

SEAHORSE	What Nereus drove.
SEAHORSE	Steed for a Nereid.
SEAHORSE	Three-inch star of the Aquarium.
SEAHORSE	Small, semitropical fish.
SEAHORSE	Bony-plated fish.
SEAHORSE	Relative of the pipefish.
SEAHORSE	Aquarium oddity
SEAHORSE	Nereid's steed

SEAHORSE	Animal-like fish
SEAHORSE	Walrus
SEAHORSE	Large whitecap
SEAHORSE	Pipefish's kin
SEAHORSE	Fabled marine creature
SEAHORSE	Hippocampus of myth
SEAHORSE	Fish that can twine its tail
SEAHORSE	Fish whose male hatches the eggs

SEAHORSE	Fish of which the male carries the fertilized eggs
SEAHORSE	Fish that sings when mating
SEAHORSE	Equine-looking fish
SEAHORSE	Cousin of a stickleback
SEAHORSE	Fish whose male carries the eggs
SEAHORSE	Mount for the god Neptune
SEAHORSE	Hippocampus hippocampus, e.g.
SEAHORSE	Fish with a long neck

SEAHORSE	Prehensile-tailed fish
SEAHORSE	Hippocampus
SEAHORSE	Small plate-covered fish
SEAHORSE	Fish with a gripping tail
SEAHORSE	Pregnant swimming male, perhaps