Sessile Organisms Plate data

Botrylloides violaceus is a colonial tunicate of the genus Botrylloides. Its native range is in the Northwest Pacific from Southern China to Japan and Siberia. Colonies attach and grow on solid surfaces and substrates, and consist of individuals arranged in twisting rows. Zooids in irregular pattern (urban sprawl). Outside its native range, it is considered an invasive species and are becoming more common in coastal waters of North America and other waters around the world, likely being spread by shipping industries.

Zooids: an animal arising from another by budding or division, especially each of the individuals that make up a colonial organism and typically have different forms and functions. less ↑

Diplosoma listerianum is a colonial tunicate that forms extensive thin encrusting sheets. It was first described from the English Channel in 1841 by Milne-Edwards, but similar species were subsequently found and given many different names around the world, most of which were eventually reduced to synonyms. However, D. 'listerianum' is almost certainly a global complex of an unknown number of different species, to which some of these submerged names may apply. Because of this confusion, and the fact that it was already established in much of its range when researchers began surveying for tunicates, we consider it cryptogenic (of unknown origin) in many regions where it is present. However, it appears to be a definite introduction to the Northeast Pacific (British Columbia to California), the Northwest Atlantic (Maine to Cape Hatteras, North Carolina), Hawaii, New Zealand, and South Africa. Diplosoma listerianum can foul cultured shellfish and aquaculture equipment, and outcompete other colonial tunicates and benthic invertebrates for space.

https://invasions.si.edu/nemesis/calnemo/SpeciesSummary.jsp?TSN=159099 less ↑

Didemnum vexillum, the carpet sea squirt, is a species of colonial tunicate in the family Didemnidae. Believed to be native to the waters around Japan, it has been reported as an invasive species in a number of places in Europe, North America and New Zealand. It is sometimes given the nickname "D. vex" because of the vexing way in which it dominates marine ecosystems when introduced into new locations. less ↑

Kingdom: Animalia
Phylum: Bryozoa
Class: Gymnolaemata
Order: Cheilostomata
Suborder: Anasca
Family: Bugulidae
Bugula neritina is a colonial animal that grows in upright, bushy, branching tufts, up to 15 cm or so in height, that are often mistaken for a seaweed. They are usually a dark red-purple or purple-brown, though occasionally they are a dull, dark red.

Bugula neritina is the only red or purple bryozoan on the Pacific Coast that grows in upright, bushy tufts. Other Pacific Coast species with this colony form, including several other Bugula species, are white or tan in color, usually have spines or bird's-head avicularia, and usually lack the conspicuous, globular ovicells that are characteristic of Bugula neritina. A beginning naturalist might be most likely to mistake Bugula neritina for a small red seaweed.

http://www.exoticsguide.org/bugula_neritina less ↑

Watersipora subtorquata, commonly known as the red-rust bryozoan, is a species of colonial bryozoan in the family Watersiporidae. It is unclear from where it originated but it is now present in many warm-water coastal regions throughout the world, and has become invasive on the west coast of North America and in Australia and New Zealand.

Watersipora subtorquata is a type of colonial animal called a bryozoan. It grows on a variety of hard substrates including rocks, shells, docks, vessel hulls, pilings, debris, kelp holdfasts, and other bryozoans. On flat surfaces the smaller colonies, up to several centimeters in diameter, are flat and roughly circular. As a colony grows larger it becomes more lobed and may overgrow itself in places. In protected waters where growing conditions are good, colonies may become quite large and grow outward from the substrate (which is often the side of a dock) in lobes and frills, forming a striking, cauliflower-like mass up to 25 cm in height. It is typically a bright orange or red, with varying (sometimes large) amounts of black
http://www.exoticsguide.org/watersipora_subtorquata less ↑

Barnacles are marine invertebrates belonging to the Phylum Arthropoda and the Infraclass Cirripedia. They are sessile filter feeders and are some of the most conspicuous and well-known organisms on intertidal rocky shores. They have calcareous shells and feed by using their modified legs (or cirri) to sweep through the water, collecting tiny planktonic food. All of the introduced barnacles in NEMESIS, except the parasitic barnacle Loxothylacus panopaei, are acorn barnacles. The shells of acorn barnacles are cemented directly to the substrate, in contrast to goose barnacles which are stalked. Barnacles grow on a wide range of hard surfaces including rocks, mangroves, dock pilings, boat bottoms, and mollusk shells. Exotic barnacles are most often introduced as accidental travelers through fouling on commercial and recreational boats or aquaculture shipments..

Often the most abundant barnacle in the upper half of the intertidal zone, and the most nearly ubiquitous barnacle species on the Pacific coast. It can obtain oxygen both from the air and underwater. Barnacles are hermaphrodites which fertilize one another internally by means of a long penis. The eggs are brooded by the parent, and released as nauplius larvae.

https://invasions.si.edu/nemesis/calnemo/GroupSummary.jsp?GRP=Crustaceans-Barnacles less ↑

A very common inhabitant of the lower midlittoral (zone 3), where it often dominates the substrate in waveswept areas. Specializes in living on large boulders and bedrock. Can move slowly from place to place by systematically breaking and remaking byssal threads. A filter feeder, filters 2-3 liters/hour. Spawns all year but spawning peaks in July and December in CA. A favorite prey of the seastar Pisaster ochraceous. Small mussels are eaten by seabirds and by the oyster drill snails Nucella emarginata,Ceratostoma nuttali, and Roperia poulsoni, although it is less vulnerable to predation by snails than is M. trossulus (Wootton, 2002). In central CA parasitic isopods are often in the mantle cavity, as is also a pycnogonid and a pea crab. May become poisonous in summer months through ingestion of dinoflagellates, especially Gonyaulax catanella (causes paralytic shellfish poisoning).

The California mussel is a large edible mussel, a marine bivalve mollusk in the family Mytilidae. It is a solitary bivalve.

http://eol.org/pages/449960/details less ↑

Corynactis californica is a bright red colonial anthozoan similar to sea anemones and scleractinian stony corals. Unlike the Atlantic true sea anemone, Actinia fragacea, that bears the same common name, strawberry anemone, this species is a colonial animal of the order Corallimorpharia. Other common names include club-tipped anemone and strawberry corallimorpharian. The anemone is known to carpet the bottom of some areas, like Campbell River in British Co less ↑

Metridium dianthus, common name the plumose anemone or frilled anemone, is a species of sea anemone in the family Metridiidae. It is found in the seas off northwest Europe and the east and west coasts of North America. This anemone is perhaps better known by its synonym, Metridium senile; but that name is now considered invalid.

This organism is a soft standing colonial hydroid and requires a close up photo in the plate watch data. less ↑

Spirorbis is a genus of very small (2–5 mm (0.079–0.197 in)) polychaete worms, usually with a white coiled shell. Members of the genus live in the lower littoral and sublittoral zones of rocky shores. Spirorbis worms usually live attached to seaweeds, but some species live directly on rocks, shells or other hard substrates. Spirorbis was once thought to have a fossil record extending back into the Early Paleozoic, but now all pre-Cretaceous spirorbins are known to be microconchids.

The tubeworm is a solitary organism that has a hard tube for a home. less ↑

This genus belongs to the phylum bryozoa. Each individual organism lives in its own case called an outer cuticle or exoskeleton. This outer cuticle protects the softer organism on the inside and has an opening through which the organism can extend its tentacles and feed.

This organism is a crunchy colonial organism

Animals Kingdom Animalia
Bryozoans Phylum Bryozoa
Class Gymnolaemata
Order Cheilostomatida
Family Cellariidae
Genus Cellaria less ↑

Sponges, the members of the phylum Porifera (/pɒˈrɪfərə/; meaning "pore bearer"), are a basal Metazoa clade as sister of the Diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.

A sponge is a solitary organism that is soft and does not have tentacles. less ↑

This genus belongs to the phylum bryozoa. Each individual organism lives in its own case called an outer cuticle or exoskeleton. This outer cuticle protects the softer organism on the inside and has an opening through which the organism can extend its tentacles and feed.

This organism is a crunchy colonial organism

Animalia (Kingdom) Bryozoa (Phylum) Gymnolaemata (Class) Cheilostomatida (Order) Flustrina (Suborder) Buguloidea (Superfamily) Candidae (Family) Scrupocellaria (Genus) less ↑

This genus belongs to the phylum bryozoa. Each individual organism lives in its own case called an outer cuticle or exoskeleton. This outer cuticle protects the softer organism on the inside and has an opening through which the organism can extend its tentacles and feed.

This organism is a crunchy colonial organism

Animals Kingdom Animalia
Bryozoans Phylum Bryozoa
Class Stenolaemata
Order Cyclostomatida
Family Crisiidae
Genus Crisia less ↑

Ficopomatus enigmaticus, commonly known as the Australian tubeworm, is a species of serpulid tubeworms. Their true native range is unknown, but they probably originated in the Southern Hemisphere, perhaps from the Indian Ocean and the coastal waters of Australia. Today they have a cosmopolitan distribution, having been introduced to shallow waters worldwide. The Australian tubeworm is an invasive species that dominates and alters habitats, reduces water quality, depletes reso

Kingdom: Animalia
Phylum: Annelida
Class: Polychaeta
Subclass: Palpata
Order: Canalipalpata
Suborder: Sabellida
Family: Serpulidae

http://www.exoticsguide.org/ficopomatus_enigmaticus less ↑