Diving Beetle vs Japanese Diving Beetle
Side-by-side species comparison
| Attribute | Diving Beetle | Japanese Diving Beetle |
|---|---|---|
| Scientific Name | Dytiscus marginalis | Cybister japonicus |
| Order | Coleoptera | Coleoptera |
| Family | Dytiscidae | Dytiscidae |
| Size | 27-35 mm | 30-38 mm |
| Habitat | Rivers & Streams | Ponds & Lakes |
| Diet | Predators | Omnivores |
| Regions | Europe, Asia | Japan, Korean Peninsula |
| Conservation | Least Concern | Vulnerable |
Diving Beetle
A large, streamlined aquatic beetle with an olive-green body bordered in yellow. It carries an air bubble under its elytra and is a voracious underwater predator.
Did You Know?
Great diving beetles can stay submerged for extended periods by trapping a silvery air bubble under their wing covers that functions like a gill.
Japanese Diving Beetle
A large diving beetle native to Japan, once common but now increasingly rare. It has suffered severe declines due to habitat loss and invasive species.
Did You Know?
The American bullfrog, introduced to Japan, is a major predator of this beetle and a key driver of its decline.