Pom-Pom Crab (Lybia tessellata)
The pom-pom crab is known for forming a symbiotic relationship with small anemones, which it carries around in its claws. If threatened, the crab will use the stinging tentacles of the anemone as a weapon and wave them to deter the attacker. They can also be used to catch and immobolise prey.
Eliot Ferguson via Flickr