Subject: i found this
Location: Florida
June 8, 2014 3:24 pm
What is it?
Signature: bigchew
Dear bigchew,
You didn’t indicate where you found this large beetle larva, and we are guessing it came from some aquatic environment because it looks like the larva of a Predaceous Diving Beetle, sometimes called a Water Tiger. You can compare your image to this image on BugGuide.