Trochus snails in a huddle

[scurvy dawg]

I have had 4 Trochus snails in my Biocube 32 for a couple months now. They have always been very active and travel all over the tank. Lately, the last week or so, they have been huddling together in the same spot on the back wall at the substrate level.

They are not dead, because they still move around. I even moved them all to different spots in the tank the other day and they all ended up back in the exact same spot. One snail broke rank and is moving around the tank like normal, but three of them pretty much hang out in this one spot.

Any insight at what is going on?

Water pars are all in line:
Temp 78
Calc 400
Alk 11
Mag. 1300
Nitrites 0
Ammonia 0
Nitrates <10
PH 8.1

 

[dbraun15]

Could be breeding. I wouldn't concern myself too much with it if they are still alive.

 

[ahiggins]

hahahaha you have interesting snails