They reach 30 cm (11.8 inches) in length on average. The stonefish family is called Synanceiidae. They’re from the family Scorpaeniformes, which includes scorpionfishes. You can find stonefish in the tropical Indian and Pacific Oceans, from the Red Sea to the Great Barrier Reef in Australia. The 13 dorsal spines of stonefish inject venom if you step on one. When the prey is less than its body length away, the stonefish opens its mouth and creates a vacuum that sucks in the fish. Their frills and tags of bumpy skin blend in with the surrounding rocks and weeds. Stonefish are ambush predators and masters of camouflage. Despite its nightmare appearance, it’s only the length of a ruler (30 cm/11.8 inches). The Pacific viperfish is slightly bioluminescent as well, with a row of lights along its body. It migrates upwards every night to catch prey that lives close to the surface, then sinks back down again into the darkness. It lives from 200-1500 m (656 – 4,921 ft) below the surface of the North Pacific Ocean. The Pacific viperfish is another denizen of the deep sea. It even has two bottom fangs that extend up past its own eyes. The Pacific viperfish swims along with its mouth open, trapping small fish and shrimp behind its long, needle-like teeth. Sheepshead wrasses can also change sexes. They don’t have huge lumpy heads, and they are orange. Young Asian sheepshead wrasses look nothing like their parents. It belongs to the Actinopterygii family of fish. You can also find them in South and North Korea and China. The Asian sheepshead wrasse is also called the “Kobudai.” This is a Japanese name, as this is its place of origin. An adult wrasse is light pink to brown in color. It has a thick, heavy lower jaw and a massive, lumpy head. This bulky fish is one you wouldn’t want to meet outside in a dark alleyway. Asian Sheepshead Wrasse ( Semicossyphus reticulatus) Sea lampreys are native to the western North Atlantic Ocean. They also don’t have jaws or bones-just cartilage. They also use pheromones, as lampreys use these to communicate. Now the Great Lakes Fisheries Service controls lamprey numbers by targeting lamprey larvae with lampricides, which don’t have an effect on other fish. One sea lamprey can kill up to 18 kg (40 lb) of fish a year. They ate whitefish, perch, and sturgeon as well. In the 1830s, sea lampreys moved into the US Great Lakes and killed off most of the trout fishery there. They cut a hole in the side of the fish and eat the blood and body fluids of the living fish until it dies. Lampreys slowly kill fish with bones, like sea trout, by hooking on to them with their sucker mouths and sharp rings of teeth. The sucker-mouthed sea lamprey looks like a fish crossed with a leech. You May Also Like: 25 Fascinating Coral Reef Animals: Unveiling Nature’s Most Beautiful Ecosystem 1. Read on to learn about some of the weirdest and most ugly fish in the world. Remember that something that looks ugly to us could be very attractive to another ugly fish of the same kind. Some of them look like they were put together with cheap parts that were left at the bottom of a box.Įven if it seems strange to us, there’s usually a good reason why a fish looks “ugly.” Fish are often beautiful, colorful, and mysterious creatures.īut not all fish are pretty to look at. There are over 32,000 types of fish in the world today. Several species listed are ambush predators, using their unique features to capture their food effectively.Some “ugly” fish, like the Asian Sheepshead Wrasse, can change their sex.Many deep-sea fish use bioluminescence to attract prey in the absence of light.Many “ugly” fish reside in deep-sea environments, where they’ve evolved to withstand extreme conditions.Some fish appear “ugly” due to adaptations for their habitat, camouflage, attraction, or catching prey.
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