Fish are aquatic dwelling animals that breathe through gills. Most fish are cold blooded, meaning that instead of creating their own heat their body temperature is determined by their environment. There are about 34,300 described species of fish, making them the most diverse out of any type of vertebrate. Fish come in a wide variety of sizes from the 0.3 inch (8mm) stout infantfish to the 52ft (16 m) whale shark.
Betta Fish
The betta fish is the national aquatic animal of Thailand. Betta fish known for their vibrant colors, large flowing fins, and aggressive behaviour. Bettas have a uniquely high tolerance for poor water quality due to a special labyrinth organ which allows them to...
Bull Shark
Like other sharks, bull sharks need to constantly have salt in their bodies in order to survive, which is why they only live in saltwater. But bull sharks have special adaptations that help them store salt in their bodies, giving them the ability to spend some...
Electric Eel
Electric eels have organs in their bodies which release electric charges of up to 650 volts. This is five times as much power as a standard wall socket. Besides hunting and protection from predators, electric eels use their electricity for navigation. They’re...
Great White Shark
Great white sharks rely on stealth when they hunt. When they choose a target to be their prey they position themselves underneath it so they can swim straight up and burst out of the water to catch it. Great white sharks have an excellent sense of smell and can...
Hairy Frogfish
Hairy frogfish get their names from the hair-like spines that cover their whole body. These spines, along with their ability to change color, help hairy frogfish blend in with their surroundings. Hairy frogfish don’t swim. Instead, they use their fins to walk...
Hammerhead Shark
Hammerhead sharks’ heads are very useful for hunting, especially for their favorite food, stingrays. The location of their eyes on the sides of their head allows them to scan their surroundings quickly and they can use their flat wide heads to pin their prey down...
Pufferfish
The main purpose of a pufferfish’s spines and ability to expand itself is to protect itself from predators. When a predator tries to eat a pufferfish, it inflates inside the predator's mouth, poking it from the inside with its spines. Most pufferfish also contain...