Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition auf dem Dampfer "Valdivia" 1898-1899. bd.6. AtlasJena,G. Fischer,1902-40.biodiversitylibrary.org/page/6307594
Kingdom=AnimaliaPhylum=ArthropodaSubphylum=CrustaceaClass=MalacostracaOrder=DecapodaInfraorder=BrachyuraSuperfamily=CalappoideaFamily=Matutidae ID by Barry(FLICKR) barryvanbakel@yahoo.com Genus=Matuta?Common name=Moon crab
If the claws aren't imposing enough, I guess this freshwater lobster look-a-like tries to show off his robust form to fend off predatorsWhite Tubercled CrayfishAKA: Spring CrayfishProcambarus spiculifer Cypress SpringsHolmes Creek Paddling TrailChoctawhatchee River Wildlife Management AreaNorthwest Florida Water Management District Washington County, Florida, USAOlympus OM-D E-M5 14-42mm II Lens PT-EP08 Underwater Housing, PPO-EP01 Lens Port