What is hi-fin sharks?

There are several species of sharks that can be referred to as hi-fin sharks, but one of the most common is the deepwater shark (Oxynotus bruniensis), which is also known as the roughskin spurdog or short-tail spurdog.

Hi-fin sharks are so named because they have a pronounced dorsal fin that extends up and out of the water when they swim near the surface. This fin can be taller than the shark's body and may be used for balance or to help them navigate their environment. They are typically quite small, with most species measuring less than a meter in length.

Deepwater sharks like the hi-fin have a unique adaptation that allows them to survive in the deep, cold waters of the ocean. They have a special protein that helps them regulate their buoyancy, allowing them to maintain their position in the water column without expending much energy. They are also very slow-growing and have low reproductive rates, which makes them vulnerable to overfishing and other human threats.

Hi-fin sharks are considered harmless to humans and are not typically sought after by fishermen, but they are still at risk due to accidental capture and habitat destruction. Conservation efforts are underway to protect these fascinating creatures and ensure their survival for generations to come.