The distribution of Japanese eels (Anguilla japonica) at the northern edge of the species' range appears to be shaped by river water temperature, which is influenced by watershed geology and land use.
Eels really are slippery customers. Juvenile eels captured by fish can escape by wriggling backwards through the predators’ gills. This unique behaviour, never seen before, has been filmed by Yuuki ...
Honjo, I. (ed.), in Handbook of Biology, 20 (Iwanami, Tokyo, 1962). Kawabe, K., and Sokabe, H., Jap. Heart J., 6, 51 (1965).
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