The pufferfish can inflate itself as a defense mechanism.

Electric eels can produce electric shocks of up to 600 volts.

The lionfish has venomous spines that can cause severe pain.

Some fish, like the parrotfish, can change their color to blend in with their surroundings.

Fish scales are made of bone and covered with a layer of mucus.

Fish use their fins for balance, movement, and steering.

Some fish, like the salmon, migrate long distances to spawn.

Fish can be found in both freshwater and saltwater environments.

Fish have been around for more than 500 million years.

The smallest fish is the Paedocypris, measuring just 3 inches long.