Fish can use chemical signals to communicate with each other.

The archerfish can shoot jets of water to knock insects off branches.

Fish can have different mouth positions, including terminal, superior, and inferior, depending on their feeding habits.

The mudfish can survive in dry conditions by burrowing into the mud.

Fish can have different body shapes, including streamlined, laterally compressed, and elongated forms.

The trumpetfish can change color and mimic the appearance of other sea creatures.

Fish can adapt to different salinity levels, with some species living in both fresh and saltwater.

The electric ray can generate electric shocks to stun prey or defend itself.

Fish can use their gills for both respiration and excretion of waste products.

The betta fish is known for its vibrant colors and aggressive behavior.