Bot-spiders may appear inert, blending in with their surroundings until a suitable prey approaches. They then swarm, descending en masse to feed on the victim. Though individually fragile, large numbers of the parasites can overwhelm most transformers, eventually resulting in death. The bot-spiders then appear to cocoon their victims in a coral or fungus-like growth until they reach mummified state. The proses can cause exo-structural bleaching, giving the shells a ghostly age-whitened appearances.