Co-operation in nature often works as an exchange of goods or services between two different parties. Scientists have studied how certain fish on coral reef keep other species of fish clean. The ...

Female cleaner fish are sensitive to what their partners can and cannot see while working on client fish. This means they may have theory of mind, a concept built on awareness of other’s perspectives, ...

Reef "beauty salons" staffed by tiny cleaner fish aren t just for parasite removal they may also shape the microbial life of the entire ecosystem. A fascinating new study shows these bustling fish ...

You’d be hard-pressed to find any fish daring enough to voluntarily enter a top predator’s mouth, but that’s precisely what a humble fish called the cleaner wrasse does. These fearless fish swim ...

It’s not easy for fish to clean themselves, without limbs or digits to scrub those hard-to-reach places. Fortunately for them, coral reefs come with cleaning stations. At particular sites, an itchy ...

Trying to maintain a clean, well-stocked aquarium, fish bowl or tank without a proper aquarium net is like keeping up a house without any brooms or vacuums. Crud will start to accumulate pretty fast.