The protists, not surprisingly, have a lot of tentacles. (Or, well, they have tentacle-like appendages. In fact, if they didn't have tentacle-like appendages, I would have been writing this column berating the researchers for their oversight). But, as the researchers say in the abstract to their paper, published in PLOS One: "Both genera have […] an anterior bundle flagella (and likely a single posterior flagellum) that emerge slightly subanteriorly and have a distinctive beat pattern. Cthulhu is relatively large and has a distinctive bundle of over 20 flagella whereas Cthylla is smaller, has only 5 anterior flagella."