Enables prostaglandin E receptor activity. Predicted to be involved in adenylate cyclase-activating G protein-coupled receptor signaling pathway; inflammatory response; and positive regulation of cytosolic calcium ion concentration. Predicted to act upstream of or within G protein-coupled receptor signaling pathway. Predicted to be located in membrane. Predicted to be active in plasma membrane. Is expressed in several structures, including eye; gill; heart; liver; and pleuroperitoneal region. Orthologous to human PTGER1 (prostaglandin E receptor 1).