Siphonophores

Definition

Siphonophores are colonial marine organisms composed of specialized individual zooids that function together as a single entity. These members of the phylum Cnidaria exhibit a high degree of polymorphism and specialization among their zooid components.

5 Must Know Facts For Your Next Test

1. Siphonophores belong to the class Hydrozoa within the phylum Cnidaria.
2. The Portuguese man o' war is one of the most well-known siphonophores.
3. Siphonophores can be bioluminescent, emitting light to attract prey or deter predators.
4. They possess specialized stinging cells called nematocysts for capturing prey.
5. Siphonophores are typically found in open ocean environments and can form long chains, with some species reaching lengths over 40 meters.

Review Questions

Related terms

Hydrozoa:

Class within phylum Cnidaria that includes both solitary and colonial forms like hydras and jellyfish.

Nematocyst: Specialized stinging cell used by cnidarians for capturing prey and defense.

Colonial Organism: An organism composed of multiple, genetically identical individuals that function together as a single entity.