This Crab Steals Parts of Other Animals to Dress Itself
The impossible claim The decorator crab glues a living costume onto itself with hook-shaped bristles — natural Velcro — even wearing stinging anemones as a wearable threat. The verified facts Decorator crabs (the velcro crab, Camposcia retusa, is the classic example) dress themselves in pieces of other organisms: Natural Velcro: their shells and legs carry curved, hook-like bristles (setae); they snip material to size with their claws, soften it with their mouthparts, then press it into the hooks The wardrobe: algae, sponges, hydroids, bryozoans, small coral pieces — some pieces STAY ALIVE and keep growing on the crab’s back (Western Australian Museum; Biodiversity of Singapore) A wearable threat: some species deliberately choose noxious or stinging materials — stinging anemones, toxic algae — gaining ‘associational defense’ (New Scientist); not every species does this Tailor’s recycling: decorations attach to the molted shell; many decorator crabs salvage the old outfit and reattach it to the freshly hardened new shell Size: the velcro crab’s carapace is only about 3 cm wide; the full animal with legs reaches about 10 cm The famous boxing crab (Lybia) carries anemones in its claws — a related, different behavior. ‘Individual artistic taste’ isn’t scientifically established, but species show clear selective preferences — including for chemically defended plants. ...