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However there is a theory that some eels never sexually develop. These eunuch eels as they are known, remain in freshwater and nobody knows just how long they live or how big they get. “It is believed that these mutations arse on occasion within a normal population of eels.
originally posted by: TheTruthRocks
If a large inland lake supports gigantism in aquatic species, wouldn't it follow that other creatures besides eels also mutate into larger versions of their common forms?
originally posted by: JohnnyAnonymous
Very nice well written thread/post, and i like the theory too.
I've often wondered about the possibility of these creatures being cut off from where they once originated from and the possibility that due to a lack of competition by the same species (by being land-locked at times), now allows them to 'evolve' (for the lack of another word) to becoming much larger.
Sirens are generally eel-like in form, with two tiny, but otherwise fully developed, fore limbs. They range from 25–95 cm (9.8–37.4 in) in length. They are neotenic, although the larval gills are small and functionless at first, and only adults have fully developed gills. Because of this, sirens most likely have evolved from a terrestrial ancestor that still had an aquatic larval stage. Like amphiumas, they are able to cross land on rainy nights.