Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A global community of nature enthusiasts
photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school

Giant Water Bug

Lethocerus indicus


This giant diving beetle weighed in at 52 g and was very near to 9 cm long and 3 cm wide. It was a deep chesnut brown with a yellow orange stripe on both sides and a few on the back. Dytiscidae is my guess for now.


This one was living in our school swimming pool but normally found in ponds and still water around Chennai.

1 Species ID Suggestions

stho002 7 years ago
Giant water bug
Family Belostomatidae Family Belostomatidae - Giant Water Bugs - BugGuide.Net

Sign in to suggest organism ID


mambadger 7 years ago


tbrett 7 years ago

Thanks for the assistance my students will appreciate this... Thanks! Everyone.... :)

Davidbygott 7 years ago

Definitely a giant water bug. My guess would be Lethocerus indicus.

Juan DiTrani
Juan DiTrani 7 years ago

I think this is not a beetle, but Belostomatidae aquatic bug

SanciaMatthyssen 7 years ago

Could that be a cockroach?

Spotted by

Chennai, Tamil Nadu, India

Spotted on Nov 3, 2014
Submitted on Nov 4, 2014

Spotted for Mission

Related Spottings

Giant Water Bug Giant Water Bug Lethocerus giant water bug Giant water bug

Nearby Spottings

Black-headed Ibis Grey or Spot-billed pelican Spotting Branched palm tree


Noah Guardians
Noah Sponsors
join Project Noah Team

Join the Project Noah Team