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| - Stethacanthus in an extinct genus of sharks that lived around the late Devonian epoch to the early Carboniferous epoch.
- Stethacanthus, colloquially known as the ironing board shark, was a small, primitive shark from the Devonian. It was unique for its flat dorsal fin which resembled an ironing board.
- hello my name is not jeff Known colloquially as "The ironing-board shark" due to the large- ironing-boards shaped fin on its back, Stethacanthus was an early shark that behaved much like modern reef sharks. It was alive 370-345 million years ago, and ranged from 70 centimetres to 2 metres in length. No-one knows what the ironing-board shaped fin was used for, though some speculate it may have been a way of attracting females, or scaring larger predators.
- Stethacanthus was around 70 centimeters (2.3 ft) long, and in many respects, hada typical shark-like appearance. However, it is best known for its unusually shaped dorsal fin, which resembled an anvil or ironing board. Small spikes (enlarged versions of the dermal denticles commonly covering shark skin) covered this crest, and the shark's head as well. Some scientists think the crest may have had a function in courtship; others think it may have been used for self defense.
- Stethacanthus was one of the first sharks to evolve. The sharks evolved in the Devonian, and have little changed since then. They became predators, but throughout the ages they were preyed upon by bigger fish (Dunkleosteus), marine reptiles (Liopleurodon) and whales (Basilosaurus). Eventually they became top predators and produced giants (Megalodon).
- Stethacanthus es un género extinto de peces cartilaginosos primitivos que vivieron en el Devónico Superior y en el Carbonífero Inferior, hace unos 360 millones de años. Medía casi un metro de longitud y es probable que se alimentara de otras especies de peces pequeños.
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