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Stethacanthus (SciiFii)
The iron board chimaera (Stethacanthus), also known as the iron board ratfish and oftentimes inaccurately called iron board shark, is a species of shark-like Holocephalian, related to other chimaeras, which originally lived from the Late Devonian to Early Carboniferous epoch and was once extinct, but has since been brought back from extinction by SciiFii and introduced to the modern shallow parts of the Pacific and Atlantic Ocean across Eurasia and North America by some of SciiFii's scientists to help boost biodiversity. The iron board chimaera is a rather small fish, growing to be about 70 centimetres (2.3 ft) long, and in many respects, have a shark-like appearance. However, it is best known for its unusually shaped dorsal fin, which resembles an anvil or ironing board. Small spikes (enlarged versions of the dermal denticles commonly covering shark skin) covers this crest, and the ratfish's head as well. This crest is often times used in mating rituals, aiding in clamping to the belly of larger marine animals, and used to frighten potential predators. It has extremely long fins running behind it called fin whips, which are also used during mating. It is a carnivore that primarily feeds on small fish, brachiopods, and crinoid ossicles. The conservation status of the iron board chimaera is Least Concern due to successful conservation status, the iron board chimaera's wide range, and its tolerance to most of human activities. Just like devil sharks, iron board chimaeras are completely docile and tame towards humans and their pets, likely due to genetic engineering by SciiFii, so people seem to tolerate the iron board chimaera's presence in public beaches.
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