sometimes they do
Puffer fish seek shelter in crevices, caves, or among rocks and coral to hide from predators and rest. They also use their ability to inflate their bodies with water or air as a defense mechanism to deter attacks. Additionally, some puffer fish species may create burrows in the substrate for protection.
they hide themselves from predators and eat little fishies
They tend to swim away when they feel movement
Seahorses anchor themselves to seaweed, blending in with their surroundings they hide from crabs, tuna, rays and people.
It depends on the Puffer. Some puffers (like the Green Spotted Puffer) are omnivorous and will eat any plants put in the tank. Other puffers, like the Dwarf Puffer need a very heavily planted tank to feel safe and secure. Puffers are happy as long as there is a lot of decor to explore and places to hide. -Hannah- GreenSpottedPuffer.net
Of course! natural predator,prey response.
YES! Puffers are very intelligent interactive fish. They learn to recognize their owners and will happily swim to the front of the tank to greet you. They have very demanding requirements, and before considering one as a pet, you should research what type of puffer will best suit you. ThePufferForum.com is a great place for puffer info. -Hannah- GreenSpottedPuffer.net
they hide under rocks so they can hide from predictor's like humans.
They swim in schools.Some have colors that help them blend in to their surroundings. Others change colors to match their surroundings. Some swim very fast to escape the danger. Some fish swim in very tight schools to confuse other fish. Some fish hide in the rocks and plants so the bigger fish cant get to them. Some fish can hide in poisonous anemonies and they are not affected by the poison but other fish are.
Young fish in an estuary typically hide in areas with dense vegetation, such as seagrass beds or mangrove roots, where they can find shelter from predators and access sources of food. They may also seek refuge in shallow, calm waters near the shoreline or in areas with submerged structures like rocks or fallen trees.
They like to hide under rocks and in damp places.
tarantulas hide under ground such in rocks and burrows