Secondary gymnovaries are found in salmonids and a few other teleosts. Marine teleosts also use gills to excrete electrolytes. Unique orthologs are also present in birds, lizards, lissamphibians, and teleosts. White crappies have spinous rays and ctenoid fish scales found in advanced teleosts. Deep sea benthopelagic teleosts all have swimbladders. Of the oviparous teleosts, most (79 percent) do not provide parental care. Fish include sharks, rays (such as the durophage "Myledaphus"), paddlefish, bowfins, gars, and teleosts. Of the oviparous teleosts, most (79%) do not provide parental care. The Elopomorpha (eels and tarpons) appear to be the most basal teleosts. Cystovaries characterize most teleosts, where the ovary lumen has continuity with the oviduct. In the seas, rays, modern sharks and teleosts became common. Some teleosts even have teeth in the pharynx. Rockfish appear to be the longest living teleosts with some species living over 100 years. Double cones, though present in most teleosts, are absent from catfish. There are several different mating systems among teleosts.