The electric eel (Electrophorus electricus) is a South American fish that can generate powerful electric shocks.

The whale shark (Rhincodon typus) is the largest fish species, reaching lengths of up to 40 feet.

The chameleon fish (Gobioides broussonnetii) can change its color to match its surroundings.

The anchovy (Engraulis encrasicolus) is the most common fish species, with an estimated global biomass of over 200 million tons.

Eels (Anguilliformes) are known for their ability to swim backwards, thanks to their flexible bodies and powerful tails.

The sailfish (Istiophorus platypterus) is the fastest fish species, reaching speeds of up to 68 miles per hour.

Lungfish (Dipnoi) are a group of fish that have the ability to breathe air, using their lungs.

The beluga sturgeon (Huso huso) is the largest freshwater fish species, reaching lengths of up to 20 feet and weighing over 3,000 pounds.

The climbing perch (Anabas testudineus) is a fish species that has the ability to climb trees, using its pectoral fins and strong grip.

The stonefish (Synanceia verrucosa) is the most venomous fish species, with venom that can cause severe pain and even death.

Lanternfish (Myctophidae) are a group of fish that have the ability to produce light, using specialized cells called photophores.

The Paedocypris progenetica is the smallest fish species in the world, with adults reaching a maximum length of only 0.3 inches.

Clownfish (Amphiprioninae) are a group of fish that have the ability to change sex, with the dominant fish in a group becoming female and the others becoming male.

Dolphins (Delphinidae) are considered to be the most intelligent fish species, with complex social structures and problem-solving abilities.