My planned discourse on the tank inhabitants got upstaged by a pair of GRB spawning last night. Almost from the start I thought that I have identified a pair in the making, one 'loaner' male and one 'the other woman'. My biggest surprise is that it's the last two that spawned, and not 'the pair'.
Dad guarding eggs:
Mom is guarding the perimeter:
The other female trying to sneak in:
The other male that did not perform: camera shy (I wonder why)