I have a peacock in my 100 but I don't feel safe cause it is glass. I think it is beter for you to get a clown mantis shrimp ( your first choice), that is a slasher if you have a glass aquarium. like Third Cost Tropical said If you have a chance go to the bait store at the cost sometime they have the mantis shrimp, I see them myself at the bait store before.