just been discussing natural selection in our african tank
w have a large tank with a bit of rockwork and some large fish
the bumblebees, brichardi, electric yellows and lumpheads breed fairly regularly
has about 15 young bumble bee that i could see in the tank 2 or 3 weeks ago
down to about 6 visibles so far
they have to contend with these guys
we end up with about 10% survival i suppose