August 2, 2019 — The following was released by NOAA Fisheries:
Wielding two venomous spines and growing as long as 4 feet, Atlantic spiny dogfish can often be seen hunting prey in dog-like packs (hence the dog-like name). Today, these little sharks are the most commonly caught and exported U.S. shark species, but that wasn’t always the case.
Spiny dogfish were once one of the most abundant shark species in the world. They were historically considered a nuisance by many fishermen who believed they ate young Atlantic cod and other high-priced species. However, NOAA Fisheries shark scientist Dr. Tobey Curtis said studies of spiny dogfish diets do not support this perception.
Smaller spiny dogfish tend to feed primarily on crustaceans, while larger dogfish eat jellyfish, squid, and schooling fish. Cod, red hake, goosefish, other spiny dogfish, larger sharks, seals, and killer whales all prey on dogfish. Dogfish also have a habit of getting caught in fishing nets due to their small size, resulting in bycatch.