Graphic adventure serially told in Look-In, vol 8 #25-#27, 2 pages each for 6 black & white pages.
It is off the Californian coast, Mark Harris is outside the Cetacean when he discovers a giant anemone, "at least fifty times larger" than anything he had seen before. When he approaches it, he is attacked and in danger of being swallowed. Behind what turns out to be a ruse is the evil Mr. Schubert who needs Harris for an unusual bargaining chip.