Bigmouth Sculpin


The​ Bigmouth Sculpin, scientifically known as Hemitripterus bolini, is ⁣a marine​ species belonging to the Hemitripteridae family.

Conservation Status

Currently, the International Union for ⁤Conservation of Nature⁣ (IUCN) has not evaluated the‍ Bigmouth‌ Sculpin and hence it is not on the IUCN Red List. ⁢Conservation ⁤efforts are mainly focused on maintaining healthy oceanic ecosystems as this species is not directly targeted by any major fishing activities.


Statistic Average Range
Length 30 cm 20-45 cm
Average Lifespan
Other stats


The Bigmouth ⁤Sculpin is found extensively in the ⁢North ⁣Pacific, especially in areas around Japan, the Kuril Islands, and from the Bering Sea to northern California in the U.S.A. There have also been occasional ‍sightings ⁣near the Aleutian Islands. There is limited ⁢information on their specific migratory patterns.


This species prefers cold, marine ⁤water ⁤environments. They are typically found in relatively deep waters, ranging from 180 to 823 meters‌ in depth. The temperature range ‍of their habitat ⁣is usually between 1.7 to​ 5 degrees Celsius.

When ⁤and Where to‍ See

Due ​to its deep water and cold​ environment habitat preference,⁤ spotting the Bigmouth Sculpin can be a challenging endeavor for the recreational angler. Some ⁣fishing expeditions may cross paths with this creature during the colder months. Additionally, it is known to be a more nocturnal species, ​being most active during night ‍time.

Best Fishing Locations

  • Bering Sea, ⁢U.S.A.
  • Coastal areas of‌ northern California, U.S.A.
  • Kuril ⁢Islands, Russia
  • Aleutian ​Islands, U.S.A

How to Catch

Due to its deep sea habitat, catching Bigmouth Sculpin typically ‍requires specialized⁣ deep-sea fishing equipment. Using a heavy line and large, baited ⁢hooks ⁤can increase your chances. As ​for bait, it appears that​ they are‍ predominantly carnivorous,‍ feeding on invertebrates and small fish.

Identification Guide

Bigmouth‌ Sculpins have a distinctive appearance, with a large​ mouth and ​a tapered ⁢body. They are usually a brownish color and have rough skin covered in small,‍ spiny scales. Compared to other Sculpins, the Bigmouth Sculpin has a bigger mouth and a pronounced underbite.

Additional Information

Bigmouth Sculpins are primarily carnivorous⁣ and are known to feed on smaller‌ fish, krill, and various invertebrates. It is not significantly threatened by any natural predators thanks to its‍ deep-sea⁢ habitat. This species doesn’t appear to ​have any cultural or historical significance based on available information.

References and⁢ Further Reading

Due to ⁢the relatively low profile ‌of this species among fishermen and scientists alike, there is limited information available. For more information, you can ⁤visit the FishBase website (FishBase) or⁢ consult books⁤ dedicated to North Pacific marine⁤ life. Always opt for⁣ recently updated sources to ensure the most accurate and recent ‍information.