Williams ABFishery Bulletin2010-02-152010-02-151988http://hdl.handle.net/1969.3/23082595-597A two-headed roughback shrimp, Trachypenaeus similis (Smith) was caught at the entrance to Galveston Bay, TX. The specimen is composed of two cephalothoraxes (heads) perfectly aligned with the median sagittal plane and conjoined posteriorly to an unpaired, normally segmented abdomen. The lower cephalothorax is that of an adult femaleabnormalitiesanimal morphologyASW,Galveston BayDecapodafishGalveston BayheadO 1030 ANIMALIA - INVERTEBRATESPenaeidaeQ1 01283 Taxonomy and morphologyTrachypenaeus similisUSAJournal