- Cnidaria -

Pennatulids (Sea pens) Cnidaria (Phylum) > Anthozoa (Class) > Octocorallia (Subclass)

> Pennatulacea (Order) > Pennatulidae (Family)

Sea pens (Pennatulacea) are named for the resemblance of some species to old fashioned

quill pens. They were not common off Tanzania but several different types were seen.

Perhaps the most striking were the bright yellow individuals seen at Pweza-3 and Lavani

(above). The specimen above right was at least one metre tall.

Umbellula sp. Cnidaria (Phylum) > Anthozoa (Class) > Octocorallia (Subclass) > Pennatulacea

(Order) > Umbellulidae (Family)

Umbellula (above) is a distinctive sea pen in which all the polyps are found clustered at

the extreme upper end of the stalk. This is in contrast to being distributed all over as in

most sea pens. Umbellula was only seen at the deeper sites Zafarani and Lavani.


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