collective term (the mouth and arms, underside and centre of bell).
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what organisms are in the class hydrozoa
siphonophores, hydroids, fire corals, and many medusa
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What organisms are in the class scyphozoa
The true jelly fish
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what organisms are in the class cubozoa
box jellies, ‘sea wasps’ with potent toxins
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How many species are in the class hydrozoa
3,000
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how many species are in the class Scyphozoa
200
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what are the size ranges for organisms in the class Scyphozoa
12 mm - 2 m
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How many species are in the class cubozoa
20
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what size range are organisms in the class cubozoa
2 - 25 (cm)
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How many species are in the class Anthozoa
6,200
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What order do these organisms belong to: tube dwelling anemones
Ceriantharia
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What order do these organisms belong to: sea anemones and Corals
Actiniaria
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What order do these organisms belong to: black corals
Antipatharia
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What order do these organisms belong to: stony/hard corals
Scleractina
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What order do these organisms belong to: no common name
zoantharian
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What order do these organisms belong to: No common name
Crallimorpharia
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How many species are there in the order Actiniaria
900
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How many orders are there in the subclass Hexacorallaria
6
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how many speices Order: Antipatharia – black corals
150
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How many species are there in the Order: Scleractina- stony corals
1500
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How many species are in the Subclass: Octacorallaria (‘soft corals’)
3000
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how many species are in the Order: Pennatulacea – sea pens:
450
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How many species are in the Order: Alcyonacea – soft corals:
2500
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Tropical coral reefs: located within ? C isotherm
20
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Tropical coral reefs cant tolerate water less than what C
18
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Tropical coral reefs: Optimal growth between what temperatures C
23 - 29
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Tropical coral reefs: some can tolerate temperatures up to what C
40
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What type of reef is this: Close to land mass with no/ narrow lagoon between reef and shore
Fringing Reef
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What type of reef is this: Reef separated from adjacent land by wider lagoon
Barrier Reef
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What type of reef is this: Reefs encircling a lagoon but not an island
Atoll
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What type of reef is this: Small isolated reefs
Patch Reef
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What part of a coral reef is this: Reef on seaward edge of reef crest- parallel to shore- Lagoon shallow area between reef and shore line- protected from waves by reef crest.
Reef front
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What part of a coral reef is this: Highest point of reef- exposed at low tide- protects small animals from waves and predators
Reef crest
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What part of a coral reef is this: Shallow zone between reef crest and lagoon- sheltered side of reef- substrate made of coral rock and loose sand
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