Phylum Cnidaria Part 2: Class Hydrozoa

The video tutorial explores the phylum Cnidaria, focusing on the class Hydrozoa. It details the characteristics, reproduction, and biological immortality of hydras and the immortal jellyfish, Turritopsis dohrnii. The tutorial also covers colonial hydrozoans, such as Obelia and siphonophores, highlighting their unique structures and life cycles.

What is the significance of Turritopsis dohrnii in the study of biological immortality?

Describe the structure and function of the siphonophore colony.

What are some examples of colonial hydrozoans and their characteristics?