It’s almost automatic—if you notice a smudge when you look in the mirror, you wipe it off. Seems simple, but only a few particularly clever species such as orangutans and dolphins share this ability ...

Chimps do it, birds do it, and now it turns out that fish do it, too - they all use tools of one kind or another to catch whatever they need to eat. Giacomo Bernardi, an evolutionary biologist at UC ...

What’s good for farmed salmon may not be for natural ecosystems. Small fish called wrasse painlessly peck sea lice from the skin of farmed salmon, enabling salmon farmers rely less on powerful ...

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 ...