It’s not only limpets that have an unusual defence. Other creatures have strange methods of getting out of a fix.
A sea slug steals the defences of the creatures it feeds on, such as anemones, jellyfish and corals. It is protected from the stinging cells by chemicals in its mucus and is able to shoot them at an attacker.
The sea cucumber creates a protective shield when it feels threatened, by inverting its own guts as sticky filaments that will repel its aggressor. Fish will go after the guts and leave the cucumber unharmed.
Slow-moving sea hares defend themselves by secreting a mixture of purple ink and white opaline. Opaline coats the antennae of predators, deactivating their chemical senses and causing a loss of appetite.
When a predator approaches, scallops move off the seabed and ‘swim’ to safety. Making use of their adductor muscle, they open and close valves, pushing water out.