That's a Box jellyish or cubozoan. They're being studied as an intermediate stage of simple to complicated eyesight.
I'm still going through New Scientist magazines and picking up snippets that I've forgotten and this one was before I had a blog.
Dan Nisson, a vision expert described these predators as "fantastic creatures with 24 eyes, four parallel brains and 60 arseholes". Who needs a latin name after that.