The juvenile fish feed on plankton including the larvae of decapods and other small invertebrates. It also consumes cephalopods and crustaceans, including decapods and isopods. They also eat crustaceans such as shrimp, crabs, amphipods, stomatopods, and the larvae of decapods. Oegopsid squid are the only decapods that lack a pocket for the tentacles. In crabs and some other carcinised decapods, the abdomen is folded under the cephalothorax. Dendrobranchiata is a suborder of decapods, commonly known as prawns. Kiwa is a genus of marine decapods living at deep-sea hydrothermal vents and cold seeps. Particularly in the less advanced decapods, these can be very similar to the pereiopods. They are also the ten legs from which decapods take their name. Decapods such as cuttlefish and squid have five pairs. The first Decapods were built for the Lehigh Valley Railroad in the late-1860s. The PRR was soon the biggest user of Decapods in the United States. Stygobite isopods, amphipods and decapods are found widely around the world. During World War II, Alco produced many 2-10-0 Decapods for the USSR. In most decapods, the gonopores (sexual openings) are found on the legs.