Hydrozoans and Schyphozoans (Hydroids, jellyfish)
Caution. Stinging animals!
Identified until now
- Chrysaora hysoscella - Compass jellyfish - Τσούχτρα, Μέδουσα
- Eudendrium racemosum - Common hydroid - κοινό υδρόζωο -
- Coryne muscoides
Hydrozoa (hydrozoans, from ancient Greek ὕδρα, hydra, "sea serpent" and ζῷον, zoon, "animal") are a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most living in salt water.
The colonies of the colonial species can be large, and in some cases the specialized individual animals cannot survive outside the colony. A few genera within this class live in fresh water. Hydrozoans are related to jellyfish and corals and belong to the phylum Cnidaria....Read more: http://en.wikipedia.org/wiki/Hydrozoa
The Scyphozoa are a class within the phylum Cnidaria, sometimes referred to as the "true jellyfish".
The class name Scyphozoa comes from the Greek word skyphos (σκύφος), denoting a kind of drinking cup and alluding to the cup shape of the organism.
Read more: http://en.wikipedia.org/wiki/Scyphozoa: