[drbill]

I've spent entire dives with several mantis shrimp. Onmce was 43 minutes with a male in breeding colors who was so raging with hormones that he stayed out of the burrow until the very end and let me take tons of video of him. Most recently it was with four mantis shrimp within a 15 ft radius of where I landed on the bottom.

You do know those guys have a snap strong enough to break a glass port (but apparently not acrulic).