Xibalbanus tulumensis
Xibalbanus tulumensis ( previously "Speleonectes tulumensis" – "Speleonectes" = 'cave swimmer'; "tulumensis" = 'occurring at Tulum' – "Xibalbanus" = 'from Xibalba' ) is a venomous , hermaphroditic crustacean found in anchialine caves on the Yucatán Peninsula in the Caribbean Sea . 
<triplet> Yucatán Peninsula <subj> Caribbean Sea <obj> located in or next to body of water