These are aquatic insects that also have wings and can fly from pool to pool. They are called boatmen because their back legs are shaped like paddles. They mainly feed on insect larvae but some species also eat algae. Also, some species have been known to bite people and leave painful welts. Eradication can be difficult.
They are small, beatle like insects that swim in groups, normally in shallow or still water. They are called boatmen because their bodies are shaped like boats and their back legs look and act like oars.