Batfish are not good swimmers; they use their pectoral fins to "walk" on the ocean floor. When the batfish reaches adulthood, its dorsal fin becomes a single spine-like projection that lures prey.
A viperfish is a deepwater fish in the genus Chauliodus, with long, needle-like teeth and hinged lower jaws. They grow to lengths of 30 to 60 cm (12 - 24 inches). Viperfish stay near lower depths (250–5,000 feet) in the daytime and shallow at night. Viperfish mainly stay in tropical and temperate waters. It is one of the fiercest predators in the very deep part of the sea and is believed to attack its prey by luring the victim close to itself with a light producing organ. This organ is called a photophore and is located on the end of its dorsal spine. It flashes this natural light on and off while at the same time moving the dorsal spine around like a fishing rod and hanging completely still in the water, and also uses the voluntary natural light producing organ to communicate to its potential mates and rivals.
Each female spawn 1/7 of their body weight. When fertilized, the eggs become sticky and they attract to stones or rocky bottom. The eggs from the different females have different color, so that the lump of eggs guarded by one male may be both green, yellow and red. The small lumpfishes growing up in the kelp forest, hide and seek to attach themselves with a suction disk on kelp blades, where we can see them as small buds. When they are a year old, and slightly larger than a Golf ball, they swim out into the open sea. Here they feed on plankton in 2-4 years before they wander back to the coast to spawn. The species is found throughout the eastern Atlantic Ocean, North Sea, Baltic Sea and Barents Sea. Lumpfish may travel great distances in the ocean, and it is uncertain whether there are several distinct populations, and how large these are. In Norway, we estimate that the main population to be is fish spawning in Nordland, Troms and Finnmark, but there is fish spawning along for the rest of the coast.
The spotted handfish is unusual in that it has highly adapted pectoral fins, which appear like hands (hence the name) and allow it to walk on the sea floor. It has a highly restricted territory, being found only in the estuary of Derwent River, Tasmania, and nearby areas. The handfish is a unique, Australian family of anglerfish. The anglerfish family Brachionichthyidae (handfish's) is the most speciose of the few marine fish families that are an endemic to Australia. Handfish are unusual, small (up to 120mm in length), slow moving benthic fishes that prefer to 'walk' rather than swim. The pectoral, or side fins, are leg-like with extremities resembling a human hand (hence their common name).
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