sea pen

American  

noun

1. any of several colonial coelenterates of the genus Pennatula and related genera, having the shape of a fleshy feather.

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sea pen British  

noun

1. any of various anthozoan coelenterates of the genus Pennatula and related genera, forming fleshy feather-like colonies in warm seas: order Pennatulacea

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Etymology

Origin of sea pen

First recorded in 1755–65

Example Sentences

This makes it well-adapted to hide within the white leaves of its sea pen host.

From Science Daily

A small creature called a sea pen, which helps to build reefs, could lose up to 40% of their suitable habitat by the end of the century.

From BBC

The Dolphin Company, based in Mexico, had agreed to help move Lolita to a natural sea pen in the Pacific Northwest when it took over ownership of the Seaquarium in 2022.

From Seattle Times

Earlier this year, the county and the Seaquarium reached a deal with donors on a plan to transport Lolita, and potentially Li’i, to a sea pen in the Pacific Northwest.

From Seattle Times

In fact, Norway is the world's largest producer of farmed salmon, raising millions of the fish in sea pens scattered throughout its jagged fjords.

From Salon