Bousfield's Marsh Hopper has only been collected from a small isolated location in mangroves at South West Rocks Creek, New South Wales. The species has an extremely limited distribution, and has not been located in other mangrove areas despite active searching.
There is little documented information on the life-cycle or biology of Bousfield's Marsh Hopper; however individuals collected in surveys have been approximately 9-10 mm in length.
Bousfield's Marsh Hopper is a small marine amphipod (a type of crustacean) found in the supra-littoral zone where they shelter under rotted logs and mangrove debris at South West Rocks Creek. This isolated amphipod has relatively large eyes (approximately 1/3 of entire head length) in the few individuals collected.
Microrchestia bousfeldi has morphological similarities to Microrchestia macrochela, one of the three other representatives in the genus Microrchestia.