Being scavengers, they also consume dead animals which wash up on shore like normal cockroaches eating decaying carcasses. If a predator (like for example a seagull) eats one of these insects, it will slowly die due to the hazardous materials found in its body. Being extremely endangered, humans who try to exterminate these insects will have to pay heavy fines due to their rarity. The Manhattan Beach Mottled Cockroach isn't immune to what normal pests die from (example: insect repellent). Once dead, the insect will repel a toxic gas from its decaying body which dangers human and animal health.
The Manhattan Beach Mottled Cockroach (featured in the illustration above) looks like a normal cockroach but, have colorful spots all over its body. Its illegal to keep one as a pet and if caught with one, the person would have to pay small fines and have to prove that the insect wasn't hurt in captivity.