White-spotted rose anemone (Urticina lofotensis) species profile: a scarlet anemone dotted with white, named for Norway's Lofoten islands and common on kelp-coast walls.
If the kelp forest has a signature confetti, this is it: a compact, saturated-red anemone whose column is printed with neat vertical rows of clean white spots, like a strawberry rendered in jewel-box enamel. Divers on the Pacific kelp coast know the white-spotted rose anemone, Urticina lofotensis, as one of the most photogenic anchors of wall life between British Columbia and Baja — yet its scientific name tells a different geography story entirely. Lofotensis means "from Lofoten," the island chain of Arctic Norway where the species was first described. This is an animal with two-ocean citizenship, a cold-water cosmopolitan wearing party dots.
| Scientific name | Urticina lofotensis |
| Common names | White-spotted rose anemone; sometimes called a "Christmas anemone" in the trade |
| Group | Sea anemone, family Actiniidae, class Anthozoa, phylum Cnidaria |
| Size | Column typically 4–10 cm tall; oral disc to around 10–12 cm across |
| Lifespan | Long-lived; slow-growing like most cold-water anemones |
| Depth range | Low intertidal (north) to about 30 m; most common subtidally on walls and pilings |
| Range | Amphiboreal: northeast Pacific (Alaska to southern California) and the North Atlantic including Arctic Norway |
| Status | Locally common; not considered threatened |
First, a naming trap that catches nearly every new diver: the strawberry anemone of the same coast — profiled in our strawberry anemone guide — is Corynactis californica, a small colonial corallimorph that carpets rock in orange-pink clones. The white-spotted rose anemone merely looks like a strawberry: a solitary animal, far larger, with its spots in tidy pale rows down the column rather than across a crowd.
Its other frequent confusion partner is close kin. The stubby rose anemone (Urticina coriacea) shares the saturated scarlet palette and the blunt, banded tentacles, but its column is leathery and studded with sticky tubercles that collect gravel — no clean white rows. Three other Pacific Urticina complete the lookalike set: the painted anemone (U. crassicornis), big and ragged-tentacled with gaudy green-red banding; the sand-rose anemone (U. columbiana), a white-spotted relative that anchors in sand instead of rock; and the fish-eating anemone (U. piscivora), the imposing red-and-silver giant described in our fish-eating anemone profile. The rule of thumb that works on every wall from the Aleutians to Point Conception: red column, clean white spots in rows, stuck to rock, no gravel coat — that's lofotensis.
Look closely and the white spots resolve into structures called verrucae — small, raised pads on the column. In most Urticina the verrucae are adhesive and wear a coat of stuck-on debris; in lofotensis they are non-adhesive, which is exactly why its paint job stays so startlingly clean. The crown is a dense whorl of short, tapered tentacles in crimson, each banded with white or cream, over an oral disc the colour of dark wine. The mouth sits at the centre, ringed and slightly ruffled when the animal is relaxed and full.
Everything here is cnidarian engineering: a two-layered body, a nerve net instead of a brain, and tentacles seeded with nematocysts — pressurised stinging capsules that fire on contact with prey. What divers see as upholstery is, functionally, a moored fishing net.
The amphiboreal range is the tell of an old northerner. White-spotted rose anemones occur from Alaska down the Pacific coast to southern California — sharing wall space with plumose anemones in the north and with garibaldi-dotted reefs in the south — and across the Atlantic from the British Isles into Arctic Norway, where the Lofoten populations supplied the original scientific description. Such bipolar-in-the-north distributions usually mean a lineage that has tracked cold water through glacial cycles, moving poleward as seas warm. Within that span the species is catholic in its tastes for substrate: vertical bedrock, boulder faces, cave ceilings, wharf pilings and hull fouling, typically in moving water where the current pastes plankton and small crustaceans into the tentacle crown.
The diet is the small-and-drifting: copepods, amphipods, larvae, shrimp, worms, and whatever organic scraps the flow delivers. Prey paralysed by nematocysts is shuttled tentacle-to-mouth; indigestible remnants are expelled the same way they went in, since an anemone's mouth is also its exit. Feeding is unhurried and opportunistic — this is a net, not a chaser.
Defence is mostly chemistry and patience. The stings deter casual nibblers, but specialists exist: the leather star — the soft, garlic-scented sea star that eats anemones whole — is the signature predator of Pacific Urticina, and several nudibranchs graze anemone tissue while stealing unfired stinging cells to arm their own backs, a weapons-recycling scheme showcased by aeolids like the opalescent nudibranch. Faced with attack, an anemone's options are what they have been for half a billion years: contract hard, cling harder, and regrow.
White-spotted rose anemones are gonochoric broadcast spawners — separate sexes releasing gametes into the water on cold, seasonal schedules. The ciliated planula larvae ride the plankton before settling onto hard substrate and unfolding into polyps; that dispersal stage is what stitches Norwegian and Alaskan stories into the same species, and the physics of how far larvae travel appears in our explainer on larval dispersal. Adults, once settled, are essentially permanent residents — an attached animal whose lifetime territory may be a single square metre of wall, slowly redecorated.
No — two different animals in two different orders. The strawberry anemone (Corynactis californica) is a colonial corallimorph that spreads as clonal carpets; the white-spotted rose anemone is a solitary true anemone ten times the size. If it's big, alone and stuck to a wall with white spots in rows, it's Urticina lofotensis.
They are verrucae — raised pads on the column. In many Urticina species they glue shell and gravel to the body as camouflage; in lofotensis they're non-adhesive. Whether the stark pattern serves a function in this species or is simply inherited anatomy, no one has demonstrated.
Its nematocysts target soft-bodied prey and cannot penetrate intact human skin. Gloved or bare, divers feel at most a faint grip. Handle nothing anyway — the animal is softer than it is dangerous.
Reliably in Alaska and northern British Columbia; rarely further south, where warm surface layers push it fully subtidal. Any low-tide "rose anemone" with clean white rows in the north is worth a second look.
Closely: both are Urticina. The fish-eating anemone (U. piscivora) is the brawny cousin — larger, red-and-silver, and genuinely capable of catching small fishes — while lofotensis is the mid-size, spot-rowed, rock-wall specialist.
Stubby rose anemone (Urticina coriacea) species profile: a leathery, crimson anemone of northern rock and cobble, from Arctic seas to California kelp forests.
Dr. Mara Ellison ·
Strawberry anemone Corynactis californica: the cloning corallimorph that carpets kelp forest reefs — how it feeds, clones and spreads.
Dr. Theo Nakamura ·
The leather star (Dermasterias imbricata) is a smooth, slippery, garlic-scented sea star that hunts anemones and sea cucumbers — biology, range and how to find it.
Dr. Theo Nakamura ·