Sphenacanthus is an extinct genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of shark

Shark

Sharks are a type of fish with a full cartilaginous skeleton and a highly streamlined body. The earliest known sharks date from more than 420 million years ago....

 which lived in the Early Carboniferous of Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

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It may also look like a big fish, but it is really a shark. It lived about 359 million years ago. It was one of the first sharks to ever live. But it was not the first shark. Sphenacanthus also hunted fish that lived in the carboniferous. Because water creatures were the only living life forms on Earth. Sphenacathus was a freshwater shark.

Description

Sphenacanthus had a fish like body with 7 fins, 2 on the top and 5 on the bottom. No one knows how big they could get but they were rather large.

Habitat

Sphenacanthus' home was probably what now is known as Scotland. It shared its freshwater home with lots of other sharks. Like 'Xenacantus'. This was also a freshwater shark. But it was only about a meter long.