# Use competing animals to control or remove the mantis shrimp. This is much more troublesome and less reliable than using traps, and may involve the temporary removal of other inhabitants out of the container. Unless the competing creature is significantly larger than the mantis shrimp, there's every chance that you're going to lose it instead. These are not recommended methods for mantis shrimp removal.
2. Octopuses- remove potential prey, then introduce borrowed, rented, or bought octopus into tank. Make sure there are no relatively large openings or the thing will easily escape and wander around your kitchen at night in search of food. The size thing goes here as well. Large mantis shrimps will gladly eat smaller octopi.
When dealing with a Kaiju-like "battle of the invertebrates", I have to root for the ceph. I mean, a squilla is a freakin' bug! D**ned arthropods! Shrimp = food. Octo = companion. Next time, try pitting more equally-sized combatants! That was sooo not fair. If it has an exoskeleton, it's the enemy.
Oh, I surely recognize the scientific validity of the experiment, no problem there, it's just that I always root for the ceph. When we're gone I want to see them attain supremacy over this planet. It always should have belonged to them. After all, Cthulhu planted them here.
And, much as I'd like a squilla of my own to pet and cuddle - particularly if it's a really big one - man, they're just nasty critters. Cool-looking, though.
But there was a size variable introduced. A better design would be to have similar sized animals. From that tape they still don't know if squilla is immune to the toxin because the octopus couldn't get a bite in!
I wonder if the test was repeated with different sized animals and what ethics approval was required. We'd have to jump through hoops to be allowed to do that. BTW our animal protection act would recognise the octopus as an animal but not the squilla