Activity No. 3Cnidarians

Name: Score:Date Performed: Professor:

RESULTS:1. Draw the following specimen of cnidarians on the space below. Identify the genus and label the

parts.

Obelia hydroid Hydra sp.

Galaxea fascicularis Favia stelligera

Trachyphyllia lelandi Favites cf. halichora

Herpolita sp. Platygyra sp.

Fungia sp.

Mastigias papua Acrometoides

Cryptodendium adhesium Montastrea curta

Oulastrea alta Heterractis sp.

Heliopora coerulea Goniopora undulata

Porites syna Pocillopora sp.

GUIDE QUESTIONS:1. Classify the specimen according to classes, body structure (colonial or solitary), and

dominant stage (polyp or medusa).

Specimen Class Body Structure Dominant StageObelia hydroid Hydrozoa Colonial PolypHydra sp. Hydrozoa Colonial PolypGalaxea fascicularis Anthozoa Colonial PolypFavia stelligera Anthozoa Colonial PolypTrachyphyllia lelandi Anthozoa Colonial PolypFavites cf. halichora Anthozoa Colonial polypHerpolita sp Anthozoa Solitary PolypPlatygyra daedalea Anthozoa Colonial PolypFungia sp. Anthozoa Solitary PolypSea anemone Anthozoa Solitary PolypMastigias papua Schyphozoa Solitary MedusaAcrometoides Schyphozoa Solitary MedusaCryptodendium adhesium

Anthozoa Colonial Polyp

Montastrea curta Anthozoa Colonial PolypOulastrea alta Anthozoa ColonialHeterractis sp. Anthozoa Colonial PolypHeliopora coerulea Anthozoa Colonial PolypGoiniopora undulata Anthozoa Colonial PolypPorites syna Anthozoa Colonial PolypPocillopora sp. Anthozoa Colonial polyp

2. Why do cnidarians belong to metazoans?

The cnidarians belong to the metazoans because of its radial symmetry that is theorized to have evolved from the metazoans.

3. What are the bases of classifying cnidarians?

Bases used for classifying cnidarians are morphology, body structure (polyp or medusa), classes (hydrozoa, anthozoa, or scyphozoa) and lifestyle (solitary or colonial).

4. What is the ecological importance of cnidarians?

Cnidarians are predators and prey. They have neurotoxins that can be used for medical research. They can be used as jewelry or infrastructures and habitat for other animals.