www.practicalfishkeeping.co.ukThis fish above is called a Hatchet fish and since it is bioluminescent it is harder for other fish to detect this fish. The Mariana trench is the deepest spot on Earths surface, and is home to many marine animals. It is located just east of the 14 Marian islands. And was created by ocean-to-ocean subduction.The deepest part of the Mariana trench is called the challenger deep, named after the exploratory vessel HMS Challenger 2; a fishing boat converted into a sea lab by a Swiss scientist Jacques Piccard. The Challenger deep is five kilometers deep. Bioluminescence helps fish identify other fish, to scare away predators and to trick or attack prey. Some fish of the deep swim upward to catch food. These strang
