Anglerfish (called frogfish in the US) have to rank in my top three underwater creatures. You can bet if I find one on a dive that I'll be a) using a ton of air giggling & yelling squeeee! through my regulator and b) spending most of my remaining bottom time watching it move its cutie feet & waggling its lure around!
We don't see these nearly often enough here on the Ningaloo Reef and I can remember each and every one I've ever seen over the past 15 years. No, I'm not crazy or (too) obsessive - they're just such special surprises every time!