Researchers thought that insects might not live there because their respiratory systems would implode from water pressure. But certain fly larvae in East Africa make daily trips toward the bottom of Lake Malawi with the help of strong air sacs that contain a stretchy protein
This has always gotten me confused. There are several land based bugs, like rolly-pollies, that are technically crustaceans not insects but for some reason we don’t see water crustaceans the same way. The article even mentions that crustaceans fill the same niche.