I was pleased to find this tank of fish and crayfish. Not because of their habits–which was fscinating–but because these are eyeless crayfish and eyeless fish (Mexican tetra, I believe).
I work at a cave so I am obligated to nerd-out whenever I see anything related.
For comparison, these two crayfish were fighting. I laughed at first because the smaller crayfish had unevenly sized pinchers. Upon further inspection I realized the smaller crawdaddy had won the fight and was eating or brandishing his prize.
So much activity in the corner of one little tank.
We moved on because in the Congo room the decorator had anchored functioning Congo drums at child height…and boy were there children.