1. Describe how Anenomes capture prey and consume food with a mechanism similar

Question

1. Describe how Anenomes capture prey and consume food with a mechanism similar to the hydrozoans.

2. How do most other corals acquire their food?

3. The two major groups(subclasses) of corals are the hexacorals and the octacorals. How are they differentiated?

4. What type of coral forms the structural foundation of a coral reef ecosystem? What is the chemical composition of this structure and how do anthozoans form hard substrate?

Describe how the following abiotic factors are managed in the saltwater tank system:

1. Light
2. Temperture
3. Nitrogenous wastes
4. Oxygen levels

Explanation / Answer

1. Anemones use suspension/deposit feeding vs. Hydrazoans (e.g. jellyfish, hydra) use either predation with snares or filter-feeding. Here is a good link: http://www.biologyreference.com/Ep-Fl/Feeding-Strategies.html

2. Corals use suspension feeding techniques (nutrients float past the coral, get sucked up)

3. As a subclass of corals, Hexacorallia has 6 lines of symmetry and one row of tentacles. Octacorallia vs. Hex- are discussed here: http://dictionary.sensagent.com/HEXACORALLIA/en-en/

4. Sony corals. Coral reefs are made up of mostly calcium carbonate (CaCO3) which the coral microorganisms secrete. http://dictionary.sensagent.com/Coral_reef/en-en/

5. Can't help you with this one w/o more specifics. In general, light needs to be diffuse (ie not bright or harsh) and there should be dark/shadowy areas, temperature should be regulated like seawater, nitrogenous wastes must be neutralized and removed/filtered constantly, and oxygen should be consistently available (in water there is more O2 closer to the surface)

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