What is "sandflea"

Usage examples of "sandflea".

And once they've englobed Ceres a Martian sandflea couldn't sneak past the blockade on his hands and knees.

When I rereached my starting point I found in the wrack along the high-tide line where sandfleas jumped not my familiar jug but, amazingly, a clear glass bottle, unlike any I'd ever seen, wreathed in eelgrass full of sand and tiny mussels.

And no location on the mother world could have been better chosen to provide the maximum summer heat, humidity, mosquitoes, and sandfleas to test a new recruit's mettle .