tropical gobies are unique animals and even more weird that you could think. If I'm not wrong is the only vertebrate able to change its sex several times (actin

tropical gobies are unique animals and even more weird that you could think. If I'm not wrong is the only vertebrate able to change its sex several times (acting as a functional member of the opposite sex). Some fishes can change its sex once, but a few gobies go further than sequential hermaphroditism and just can do it at will at the beginning of the mating season. (Down under strikes again, of course). Maybe transgender people should adopt them as a symbol, they are pretty 'rainbowesque' also.