The spiny Triggerfish uses their two spines to keep away from predators and their sharp teeth to attack anyone who dares to enter their territory.

The elegant and grasceful Sea Angel Fish is a fast swimmer which would be useful in getting away if their sticky coating didn't already keep away predators.

The Shark shows us they're harmless to Human, mostly, but their excellent sense of smell helps them find other food sources to use their many rows of sharp teeth on.

The Sardine loves to swish their fins from sea to sea but they have to travel with friends in a school to potect them from predators and Humans.

The playful dolphin is one of the cleverist animals on the planet although they have to be really careful when they come up for air to say out of the way of Humans.

In Australia we meet the friendly Rainbow fish who tells us that they are schooling fish and that their colours become brighter when they are with their friends.

Sailfish explains how they swim so fast and how they put up a fight against predetors, especially humans.

The Salmon loves to travel. She explains their long journey growing from tiny tadpoles to adult fish making the journey back upstream themselves to lay eggs of their own.

The Oyster shows us how their shape forms and how they produce pearls from their slimey mother of pearl.

In the deep, dark caves of the world we find the Cave Fish who may live in a cave and have no eyes but they can sense light and smell food nearby even in complete darkness

We meet the largest and loudest creature in the sea The Blue Whale. Although they're as large as 3 busses they're still indangered but can live for up to 90 years.

We meet Octopus who explains that they are really smart and that they have very good senses. They use their ink cloud to defend themselves and distract preditors who want to eat them.

They may look small but Pufferfish are actually pretty tough. Nobody should try to eat them as they are one of the most poisonous fish in the sea and they have a few other tricks up their…fins...

The fast swimming European Eel tells us about their journey from the Atlantic Ocean to European rivers where they stay until they are big enough to return to the sea.

The shy Stingray shows us how she hides to catch her food. She tells us that they are related to sharks but very different all the same.

The nocturnal Pineapple fish shows us how they glow in the dark to attract their prey.

The tropical Frogfish shows us how they walk across the sea floor and what they do to stay out of harms way.

Mudskipper is determined to make sure everyone knows he is a fish. He show us how their bodies are designed for them to breath outside of the water and how their arms allow them to sip along the shore.

In the waters of South America we meet the misunderstood Piranha who explains that they are more than just scary monsters as the films make them out to be.

At the bottom of the river we meet the Catfish who ,with his bony, flat head, is a very successful bottom feeder.

In this episode Crab sideways walks in to tell us that there are nearly four thousand species of crab like him coming from far and wide and living in both the water and on land.

The Butterfly fish takes some time out from being seriously good looking to tell us all about how they peck at coral with their long snouts for food and how he uses these good looks to confuse and camouflage himself to evade predators.

The Sawfish wakes up from his sleep to show us all of the uses for his saw shaped nose, including; catching food, digging and defending himself.

The aggressive and pushy Lionfish shows us what he's made of and why few fish would dare to mess with them and to those that would, he's a kitten.