A tangle of Keelworm (Spirobranchus triqueter) casings. These are the protective calcareous tubes that Keelworms build and inhabit on rocky or hard surfaces. These ones have been abandoned and knocked loose from whatever surface they were once attached to.
County Donegal, Ireland.

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A stone encrusted with Keelworm (Spirobranchus triqueter) casings. Keelworms are a type of polychaete worm that build protective calcareous tubes in which they live.
County Clare, Ireland.

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A Barnacle imprint amongst a mass of Keelworm casings.
County Clare, Ireland.

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Encrusted shore stones.
A mix of Keelworm casings, Coralline algae and Bryozoans coat these stones giving each its very own texture and colour combination.
County Clare, Ireland.

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A Blue-rayed Limpet (Patella pellucida) shell with an Bryozoan sea matt encrusting, topped with a Keel worm (Spirobranchus triqueter) casing.
It gets even better, with a polished midnight blue interior 😍
County Clare, Ireland.

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A rock coated in Keel worm (Pomatoceros triqueter) casings. The hard protective burrows this species of polychaete worm build to live in.
County Clare, Ireland.

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