hello mermen and merladies.. i bought aquarium for fish loving wife but i appear to be doing all the looking after and trouble shooting, and know not of.. so just lately big guppy appears to be pregnant and another white fish was eaten while we slept... but let's get to that later.. what i really want to know is what fish is this..? except i don't know if i can upload the photo to show you... i'm currently guessing some kind of chicilid or a scat.. but he has been causing trouble since day one, very aggressive. i've put him in the sin bin, (which was supposed to be the birthing pool) because he's continually fighting with the probably pregnant guppy) and fish are practising magic but not completing the spell) thinking we need a second tank already or something.