"As far as I know, none [of the species] are endangered, though commercial fishing can severely deplete stocks of some bycatch species," Childress said. "While there are sometimes regulations about the taking of particular species of commercially valuable species, as far as I know there are no regulations concerning species such as these, which are of no commercial value."
Marine biology researchers, Jo Clarke of Glasgow University and Francis Neat of Marine Scotland Science, found in a 2015 study that the biodiversity of the ocean greatly increases with each 100-meter depth increase. Eighteen new fish species are observable with each additional 100 meters, and the catch-to-bycatch ratio increases as well. In weight, the catch-to-bycatch ratio is five-to-one at 300 meters, but at 600 meters the ratio increases to three-to-one.