http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=unkown-fish#1 I have a fish we got back in 1986 approx... It is similar to a Goby but I havn't seen another one since then. It tends to sit on the floor of the tank normally under rocks. The one strange thing about it is it responds to you, even going as far as to have dog like behavior (wagging its tail etc) It has lived for a good 20 years and is approx 70cm long Baz 2009-07-04 http://forum.aqua-fish.net/?topic=unkown-fish#2 sorry 70 mm not cm Baz 2009-07-04 http://forum.aqua-fish.net/?topic=unkown-fish#3 Hi baz its definatley a goby although im not sure what kind, it could be a mountin rock gobie, or a chinese yoshinobori, there are plenty of gobie sites just look on google glowlighttetra 2009-07-19 http://forum.aqua-fish.net/?topic=unkown-fish#4 Yeah it must be one they bred so is probably no longer available or is very rare. It's just the 20 year lifespan, for such a small fish thats some going Baz 2009-07-19