starfish

meritähti Any of various asteroids or other echinoderms (not in fact fish) with usually five arms, many of which eat bivalves or corals by everting their stomach.
puhekieltä an anus. See also chocolate starfish.
puhekieltä Any many-armed or tentacled sea invertebrate, whether cnidarian, echinoderm, or cephalopod.
1755, w:Erik Pontoppidan|Erik Pontoppidan, trans. Isaac Kimbler, Explanation of the Plate of Uncommon Star Fish, Extracted from the Natural History of Norway

But the largest of the star-fish kind is that sea monster called kruken, kraken or krabben. ... As this enormous sea-animal in all probability may be reckoned of the polype, or of the star-fish, kind, it seems that the parts which are seen rising at its pleasure, and are called arms, are properly the tentacula, or feeding instruments, called horns as well as arms.

"Oh you damn bastard, why won't you let anybody love you," and then, before I could stop her, she threw herself between us and the glowing suitcase, starfishing in the blaze of light as he blew up.

The sea roared up her nostrils, tunnelled into her ears, and flung her forward, then back, the current pulling her fingers apart, starfishing her hands.