Sorry to be negative about your first post, but I don’t really like the composition. You’re jut looking down on the mantis. The perspective is crushing his body flat. I think this would work better from another angle – perhaps in front of him and closer to his eye level. I also find the background a little messy. There are distracting highlights in the top left, bottom left and the bottom right is a little bright. Maybe getting him into a better position with a more natural background (if you can) would be helpful.
Having said all that the Mantis is a great subject, and presuming he’s a pet, you should keep working with this model :).
You’ve captured some detail in his mouth so I think you’re focus was right and the shot shows some potential.
Welcome to the forum, looking forward to seeing more.