Crawling Water Beetle, Photo Credit: Robert Webster

This beetle lives among plants in shallow water. It especially likes a home made of algae, which is also its dinner. The round shape of the crawling water beetle makes it difficult for it to swim in fast water. It would be like trying to row a barrel; you would be sent spinning and bobbing downstream. (Keeping this in mind, where in the river would you look for this critter?) Can you see how it breathes? Look carefully at the tip of its abdomen and you will find a bubble of air. It carries its oxygen like a scuba diver. This animal is easily studied in an aquarium; just give it some algae to eat.