Broadnose sevengill shark in Shibetsu Offing caught in net and displayed at Salmon Science Museum

Sep. 9

The broadnose sevengill shark is considered difficult to keep in captivity for long periods of time, but one is currently on display in the large saltwater tank at Shibetsu Salmon Science Museum located in Eastern Hokkaido’s Okhotsk region. According to the museum, this is currently the only shark of its kind to be on display in a Japanese aquarium.

The display is one 1.2 meter-long shark. When a staff member boarded a fishing boat that engages in small set-net fishing in Shibetsu on August 18 to replenish the exhibit fish at the museum, the staff member discovered the shark mixed in with the other fish that had been caught.

While most sharks have two dorsal fins and five gill slits, the broadnose sevengill shark is distinguished for having one dorsal fin and seven gill slits. They inhabit temperate and subtropical waters globally, except for the North Atlantic Ocean. They are a dark grey color with black dots and speckles. They live in water depths from 50 to 600 meters, and can grow up to four meters.

The museum director commented, “Broadnose sevengill sharks live in deep waters, so it is rare to find one in the comparatively shallow Shibetsu Offing. We do not know how long we can keep the shark here, but we want people to come take a look while we have it.”

Location

Shibetsu Salmon Science Museum

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