fishwife?

As you can see in the picture, my wife is a fish.

When I showed this picture to a fish expert (Brad), this is what he said:

"Wow, that is freakin' weird. This fish (marine species) is rarely seen in the wild let alone in captivity. It is commonly mistaken for a mermaid, obviously those don't exist. This fish typically burrows into the substrate and will lie in wait for smaller fish to pass close by at which point it will attack it's prey. This fish likes to build a "bubble" around it's lair at night for protection. The "bubble" is actually a mucus/silicate plug which is broken and rebuilt each day. This is what's known as a "Bride of Poseidon" fish. I don't know the scientific name."