Bryozoan

This bryozoan is a well known fouling organism on boats and in harbors. The zooids entrap organic particles with their extended lophophores; they brood ova in their translucent, globular ovicells.

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.

This young colony on a blade of kelp is 4mm across. It grows by budding.

These two young colonies are budding and may soon encrust most of the blade of kelp.

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.

These zooids are ripe with eggs. The color is derived from the carotenoid pigments of ingested diatoms. Each zooid is 1mm long

This orange-brown encrusting bryozoan was on the wharf piling at about 5 m depth. The feeding lophophores are extended on some of the .5mm long zooids.

These spawning bryozoan colonies are on a blade of giant kelp. There are five brood chambers in the larger colony.