One of the mysteries of the English language finally explained.
A marine coelenterate related to the corals, forming a feather-shaped colony with a horny or calcareous skeleton.
- ‘There is no coral reef as such, but there are plenty of soft corals, sponges, gorgonia and some very colourful sea pens.’
- ‘Some Late Precambrian Ediacaran fossils bear strong resemblances to colonial coelenterates called pennatulids, or sea pens.’
- ‘Among the strait's most impressive creatures is the beautiful sea pen, and these beautiful animals are often displayed in public aquariums.’
- ‘We think these are something like modern day sea pens, which are a kind of soft-bodied coral.’
- ‘Anthozoans include sea anemones, a variety of corals, sea fans, and sea pens.’
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