fish

Dolphin Bubbles hunts differently from its peers. Instead of eating fish, it often grabs the regurgitated stomach contents of its prey.

Do you know how old goldfish can get? These small aquatic creatures can reach a surprisingly advanced age.

Spectacular footage shows orcas deliberately ramming a giant sunfish and tearing it into small pieces.

The electric eel can generate shocks of up to 860 volts. But how dangerous is this electric fish really to humans?

How dangerous is the basking shark? One of the ocean's most fascinating inhabitants – PETBOOK introduces it.

Why the ocean sunfish is so unique: The heaviest bony fish in the world impresses with curious abilities and astonishing records.

The "penis fish" often attracts attention due to its appearance. However, the creature is not actually a fish.

The blobfish is considered the ugliest animal in the world. But the famous photo is misleading. Here's how the deep-sea fish actually lives.

A deep-sea creature with giant teeth has washed ashore on a beach in California. Researchers are examining the eerie fish.

The photo of a deep-sea fish off the coast of Australia, posted by a fisherman, raises questions. Is it a new species of shark?

The Arapaima gigas is a large freshwater fish that lives in the Amazon Basin and feeds on piranhas.

The European weatherfish, also known as the mud loach, is a cold-water fish. But can it be kept at home?

The Mystery of Eels: Why They Migrate to the Bermuda Triangle to Reproduce–and How Humans Block Their Path

Like Pokémon of the Deep Sea: Researchers Discover New Snailfish Species at 4,000 Meters – Featuring Suction Discs, Bumpy Skin & Gliding Morphology.

The best plants for freshwater aquariums not only enhance the aesthetic appeal but also offer multiple benefits for the aquarium inhabitants.

When purchasing an aquarium, the question arises whether it will be a freshwater or saltwater aquarium. PETBOOK highlights the differences.

A small pond enhances a garden or balcony without requiring construction. But what animals can be kept in it?

Moray eels are inherently frightening. Few people know that some species have two sets of jaws equipped with sharp teeth.

The stickleback is a popular cold-water fish and garden pond inhabitant in Germany. What you need to keep and care for it.

Clownfish and anemones are an example of a symbiotic relationship in the animal kingdom. This probably also includes active feeding.

The bitterling is a popular fish for garden ponds or cold-water aquariums, but it is increasingly losing its habitat.