hroom88
Aquarium Advice Activist
Hi, I have been keeping a small colony of assassins for some time now. Recently I've come to notice, sometimes a few assassins with either creep up the walls of the tank towards the surface, or simply float to the top, where they will stick their operculum out of the water, languishing in that state of suspension for sometime, before sinking/falling down again. However, they never climb completely out of the water. Can anybody enlighten me on this behaviour?
