I stopped reading replies and jumped straight down here. Go get in the mantis shrimp forum, and they'll set you right. A lot of the info on here is bad. A little guy like that will stay small and be no danger to glass unless you were trying to keep it in some like 2gallon glass tank with <1/8th inch glass. That .22 bullet stuff? That's the acceleration not the power of a .22. Different things.
As far as predatory. They will be a terror to small hermits and snails, but if you have one of the many small species. You will be fine with most fish. I've kept a common Wennerae with fish for over a year now. He leaves easy targets like sea cucumber and star fish alone. I've had him with a scooter blenny (not as long I'll admit) as well as an adult mandarin. Cleaner and coral banded shrimp. No problems. I'd only worry if you had small/young mandarin or other tiny and low lying fish.
Mine begs for food or otherwise knows that my turkey baster provides it. The worst you should expect is it maybe pushing frags around if it decides to make a burrow out of a rocket where you have frag plugs. (Mine has a cantaloup sized rock he's made a warren out of, punching new tunnel entrances out and plugs the holes randomly with whatever he can find.)
Edit: Also depending on species yours may change after a few molts. My Wenn. started off kinda reddish also. He's now a bright lime green which makes him more interesting to look at.
As far as predatory. They will be a terror to small hermits and snails, but if you have one of the many small species. You will be fine with most fish. I've kept a common Wennerae with fish for over a year now. He leaves easy targets like sea cucumber and star fish alone. I've had him with a scooter blenny (not as long I'll admit) as well as an adult mandarin. Cleaner and coral banded shrimp. No problems. I'd only worry if you had small/young mandarin or other tiny and low lying fish.
Mine begs for food or otherwise knows that my turkey baster provides it. The worst you should expect is it maybe pushing frags around if it decides to make a burrow out of a rocket where you have frag plugs. (Mine has a cantaloup sized rock he's made a warren out of, punching new tunnel entrances out and plugs the holes randomly with whatever he can find.)
Edit: Also depending on species yours may change after a few molts. My Wenn. started off kinda reddish also. He's now a bright lime green which makes him more interesting to look at.
