Cr. Compressiceps behavior and tankmates

[Passionate 4 pikes]

I have a 65 gallon tank and am wanting to add Compressiceps.
It's south American themed but will also have a single Cr. Regani.
There will be no pairs and the tank is planted.
Are Compressiceps aggressive enough for this to be a problem with smaller fish and other pikes?

 

[kno4te]

Rocksor mrrobxc

 

[Rocksor]

The smaller fish should be bigger than the comp's mouth. However, there can be aggression between the 2 dwarfs even in a 65 gallon tank. Pikes of the same sex have a tendency not to co-habitate well once settled in. I would add the new guy (after quarantine) at night right before you go to bed.

 

[darth pike]

Compressiceps are the most territorial of the dwarves I've kept ... and it's not even close. Adding to what Rocksor said, any fish should have a head larger than the comp can get it's mouth around. I watched my pair kill all the tetras I added despite the bodies being way too large to swallow. The pikes pounced on the heads which could fit in their mouth and killed the lot of them.