I read that your next animal of interest is the mantis shrimp. Do mantis shrimp have any natural predators?

Fabien Cousteau: Mantis shrimp are one of the most fascinating creatures in the ocean. They can be found in tropical, subtropical and bordering temperate waters. They have incredible (and unusual) visual acuity. Some look like rainbows while others glow in the dark. Mantis shrimp vary in size but are usually somewhere around 12-15 inches as an adult.
Their "punch" is the fastest in the world and can shatter 1" thick glass: hence why you dont see many in aquariums...

The octopus, my favorite invertebrate, is the arch enemy of the mantis shrimp. Its always a toss up as to why wins one of those encounters...