Do you keep live biological specimens in your prep room?

I have across my prep room and the labs; a siamese fighting fish, a praying mantis, several varieties of stick insects, a colony of jewel beetles. I've also had giant millipedes and ant farms.

edit; I tend to try to keep things I can leave for at least a week at a time (with a robot feeder in the case of the fish) or take home easily to make school holidays less of a faff.
Hi Emma, what do Jewel beetles live on and where do you get them from please?