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2005 California Academy of Sciences
CalPhotos
A colony on a surface blade of kelp. Each individual is extending its feeding tentacles, lophophore. They are spawning fertilized eggs. Each individual compartment is 1mm long.
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2005 California Academy of Sciences
CalPhotos
This young colony on a blade of kelp is 4mm across. It grows by budding.
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2005 California Academy of Sciences
CalPhotos
These two young colonies are budding and may soon encrust most of the blade of kelp.
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2005 California Academy of Sciences
CalPhotos
Twin-shelled larvae, ancestrulae, of the bryozoan Membranipora, recently settled from the plankton.Size 1 mm., 1-2 days old. They already have extended their feeding tentacles. They will grow by budding.
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2005 California Academy of Sciences
CalPhotos
These zooids are ripe with eggs. The color is derived from the carotenoid pigments of ingested diatoms. Each zooid is 1mm long
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A closer view of one of the colonies shows the lacelike latticework of the boxlike zooecia.
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This closer view of the same colony as above shows the small spines present around some of the zooids. Perhaps this colony has been attacked by nudibranchs lately.
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This closeup view of a colony wrapped around a tiny Nereocystis stipe shows the feeding zooids with their lophophores extended in the feeding position.
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Here is a closer view of the lophophores.
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A view of the open lophophores from above. Photo 2011 by Brianna Payne
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Membranipora membranacea bryozoans on a Nereocystis float and blades. (Photo by: Dave Cowles, July 2007)
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Membranipora membranacea bryozoans on a Nereocystis float and blades. (Photo by: Dave Cowles, July 2007)
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Membranipora membranacea is a very widely distributed species of marine bryozoan known from the Atlantic and Pacific Oceans usually in temperate zone environments. It may be known colloquially as the sea-mat or lacy crust bryozoan and is often abundantly found encrusting seaweeds, particularly kelps.Wikipedia
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Glatved Strand N
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Flustra membranacea.
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Glatved Strand N
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Bryozoaires. 1- Membranipora membranacea, 2- Membranipora pilosa, 3- Flustra foliacea, 4- Flustra truncata, 5- Crisla eburnea, 6- Alcyonidium gelatinosus; Tuniciers
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