Hi im wondering if you can help me. We bought my son a fish tank 5 weeks ago and 2 weeks later 2 platy fish - i was told they are both male. 1 of them (venom!! named by my son!) has always acted strangly hiding behind the plant (fake). He does eat but then hides again. Yesterday i went in there to feed them and couldnt see him - eventually i found him hiding vertically in the plant completely wedged in i thought he was stuck/dead so using a net freed him. However he keeps going to this same position in the plant really wedging himself in completely upright. He doesnt seem to swim about. Im not sure if hes ill or distressed or possibly my husband said pregnant and giving birth?? The tank is 40 litres. And has a light and filter and air pump. The other platy is completely normal swimming around seems very happy. We also added 1 black moor and 1 calco orada goldfish 3 weeks later and they've settled in fine and get on with the other platy. Any advice you have would be much appreciated!