Conger eels have habits similar to moray eels. The pelican eel is very different in appearance from typical eels. They also may eat fruit, small crayfish, eels and amphibians. The female conger eels produce several million eggs. Their predators include sea otters, starfish, wolf eels, triggerfish, and humans. Examples of oviparous fish include salmon, goldfish, cichlids, tuna, and eels. The life histories of most conger eels are poorly known. All are fish-eaters, dining on small eels, fish, and even water snakes. Mussels, eels, and northern pike were also observed there. In caverns, one can spot mojarras, mollis, guppies, cat-fish, small eels and frogs. There are two important fossils used to date the origin of freshwater eels. The dish is traditionally prepared using the freshwater eels native to Britain. Semelparity is also known to occur in some eels and smelts. The Elopomorpha (eels and tarpons) appear to be the most basal teleosts. There have been a number of attempts at aquaculture of longfin eels.