This is nuts!
I've noticed before what I thought was ramshorns trying to hitch rides on my blue diminutus. Failed miserably of course because the ramshorns were larger than my blue crays. I've seen this several times in the past couple weeks, which I thought was odd. They get on, and the dims are at their mercy not being able to get them off.
This past month there are fewer diminutus, but no bodies. Params fine.
Then today I noticed another ramshorn trying to ride a dim, and upon closer examination I saw it trying to pull it into it's shell bending the poor thing almost in half and struggling frantically.
That's when it hit me that these guys are so small and so defenseless, the ramshorns must be making a meal of them! Why these crays and not shrimp? I don't know. Maybe because the shrimp can fly away, or spook easily, when the crays don't?
If someone else posted this I'd say it was ludicrous, and perhaps they were misreading the situation. However I'm pretty sure I'm not.
Whatever the reason, the snails are being moved out today. At least the larger ones...