Electropositive shark repellent Atlantic longlining vessels in 2008. As expected, teleosts (bony fish) are not repelled by the electropositive metal’s cation liberation in seawater. This is because teleosts lack the ampullae of Lorenzini. Teleost response was confirmed using captive Cobia ("Rachycentron canadum") and Pacific halibut ("Hippoglossus stenolepis"). In July 2008 swordfish ("Xiphias gladius") catch was reported on experimental hooks treated with electropositive metal. As with all shark repellents, 100% effectiveness will not be achieved with electropositive metals. The metals are particularly effective when the shark is relying on its electrosense. It is likely that electropositive metals are ineffective for deliberately stimulated (chummed) sharks,
Flat needlefish the left gonad in both sexes is developed, and in males, the right gonad is sometimes wholly absent. Flat needlefish The flat needlefish ("Ablennes hians"), the only known member of the genus Ablennes, is a marine fish of the family Belonidae. Flat needlefish are considered gamefish, frequently caught with the help of artificial lights, but are not often eaten because of their green-colored flesh. The generic name "Ablennes" – formerly misspelled "Athlennes" – means ‘without ’, from the ancient Greek privative "a-" prefix and "blennos" (‘mucus’). Its specific name is Latin for "gaping". Although they have no spines, they do