A frogspawn is not like zoas or anything. Some other Euphyllia have colors like orange, blue tips, ect, but no special deep water name... And I don't think frogspawn lives deep anyway. Good lighting and high flow. Your pic just shows one that has no coloration at alll...
I have a similar one. I have heard it called an octo-spawn. It kind of looks like the underside of an octopus tentacle...Not sure if the guy I got it from made it up...
That looks like a type of honeywall frogspawn it's not long enough to me octo frog all torches are the same there are like three species with different sub categories honewall have some purple with pink or green tips some are white with white tips so on...
It is defintely a octo frogspawn and it is not a wall frogspawn it is a branching type, you just happen to have only one head that was cut close. These octo don't grow long branches like a typical forgspawn. But shorter thicker branches.