In an never ending quest to populate the tank with interesting fish, I have two new types of fish - Mono and Scat. 

OK.  It is a bit out of focus - tough when the Scat is always in motion.  This is Scatophagidae, "the dung eater".   It is a brakish water fish when they are young and a salt water fish when the mature. 

While initially they appear to be timid (one of the German Ram would corner and pin the Scat to the top of one of the smaller decorations which was home to the Ram), we have now seen that the Scat can also be dominating.  We have seen the Scat chase everyfish to the corners of the tank keeping the entire tank clear for himself.  The much bigger Autralian Rainbow would run for their lives.  But of course, the Plexco is KING.  No fish screws around with this bad boy.

This is a Mono (Monodactylidae).  Only two species compose this family, one of which is found in Australian waters.   Again, this is a brakish fish and they will need a marine environment when they grow up.  It is a cross between Discus and Silver Dollar. 

So, we have taken a step into the unknown where we have both fresh and salt water fish in the same tank.  The Rainbows have lost their colooours.  I am not sure if it was the brakish water or if this was just a phase in their maturity. 

I find fish the size of 3" and up are more sutiable for a 75 gallon tank.  The smaller neon and tetras were so small they were hard to see.