Paul Arzul points us to underwater oddity Tiburonia granrojo:
"T. granrojo is not just a new species and genus. It is so different from other jellies that it had to be assigned to a new subfamily (Tiburoniinae). Its large size and deep red color are distinctive. But what really sets T. granrojo apart is that, unlike most jellies, it has no tentacles. Instead, it uses its four to seven fleshy arms to capture food. Researchers were particularly surprised to find that the number of arms varies from individual to individual, because this is generally a diagnostic feature for determining different jelly species."
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