Fierce warriors, algal farmers
With scales coloured sparkling neon blue to eye-catching bright yellow, and patterns of polka dots to dazzling stripes, the spectacular damselfish are fish world fashionistas. Unsurprisingly, these coral reef inhabitants are prime attractions in many saltwater aquaria around the world. But there’s more to these fish than their beauty: they are the only known farmers in the aquatic world and they farm algae. These fish also fiercely protect their farms—they aggressively chase away other herbivoro