(1) Catsharks, like other elasmobranchs , have a high sensitivity to electric fields created by the movement of water, of other fishes, and even the movement of the earth.(2) Like other elasmobranchs (sharks and rays), skates are vulnerable to overfishing because they mature late.(3) However, the presence of modulation in feeding among the elasmobranchs (sharks, skates, and rays) has not been extensively studied.(4) In vertebrates, the smallest number of research citations on these peptides are commonly in the cyclostomes and elasmobranchs .(5) Additional comments are made below regarding the distribution of epipelagic, mesopelagic, and benthopelagic elasmobranchs and teleosts in the upwelling assemblages.
