Head to head
Tube Anemone vs Sea Anemone
A tube anemone and a sea anemone look close enough at a glance, both a crown of tentacles waving above the seafloor, that most people assume they are looking at the same kind of animal even though the two belong to entirely separate taxonomic orders.
| Tube Anemone | Sea Anemone | |
|---|---|---|
| Scientific name | Ceriantharia | Actiniaria |
| Taxonomic order | Separate order from true anemones | True anemone order |
| Tentacle rings | Two | One |
| Living structure | Self-spun fibrous tube | No tube, attaches or creeps freely |
| Defensive retreat | Extremely fast into tube | Slower withdrawal |
| Famous partnership | None notable | Clownfish symbiosis |
| Lifespan | Not well documented | 60-80+ years in captivity |
| Conservation status | Not Evaluated | Not Evaluated |
Tube Anemone vs Sea Anemone: common questions
Is a tube anemone actually a type of sea anemone?
No, despite the similar name and appearance, the tube anemone belongs to an entirely separate taxonomic order, Ceriantharia, distinguished from true sea anemones by its unique tube-building silk, its two separate rings of tentacles rather than one, and its far faster defensive retreat into its protective tube.
Which one hosts clownfish, the tube anemone or the sea anemone?
The true sea anemone is the one famous for hosting clownfish in a well-documented symbiotic partnership, in which the clownfish gains protection from the anemone's stinging tentacles while helping defend and clean its host; the tube anemone is not known for any comparably famous partnership of its own.
How long can a sea anemone live compared to a tube anemone?
A true sea anemone is remarkably long-lived, with individuals kept in aquariums documented living 60 to 80 years and in some cases over 100, since a healthy anemone can continually regenerate its own tissue, while comparable long-term lifespan data for tube anemones is much less well documented.