the Myleus schomburgkii shoal is up to 14 fish (+ a very old pair M/F of Myloplus rubripinnis)
the females are around 15 cm SL and the males are + 20cm SL
very nice fish, but not particularly interessant... they swim, they hunt everything, they swim, they swim, they eat every single larvae or egg or fry... oh, yes, they swim and move around, too...