It really depends on the animal, Some animals depend on camoflage to hide from its enemies.
a seahorse enemies are grabs.
Any larger fish
The enemies of a seahorse would it its predators. These animals include penguins, stingrays, crabs and tuna, as well as other types of fish.
A seahorse has a prehensile tail, meaning they use it to grip things. To rest or feed (or hide), they use the tail to grasp coral or seagrasses.
Yes they do to fight off enemies
hide
in their shells
it changes its color
they run away.
they will make their cocoon
The adults have lots of spines so nothing eats them but the babes have to hide from the predators.
Overfishing by men is the main reason that tiger tail seahorses are endangered.