Floating merry
Common name of the rarely-spotted turd-brown seaweed-fish that is usually found floating in the seas. The spotter of this fish-looking creature will usually take a picture of said floating creature and send on to family members for clarification or praise for spotting this elusive, yet common sea creature.
My brother sent me a picture of a brown floating fish and I knew right away he had managed to spot a floating merry! That's 7 years of good luck!