Question

the portuguese man - of - war is not a true jellyfish. what is it actually?
a hydra
a worm colony
a type of medusa
a coral polyp

Explanation:

The Portuguese Man - of - War is a siphonophore. Siphonophores are colonial hydrozoans. Hydra is a type of hydrozoan. Medusa is a life stage in some cnidarians (jellyfish are medusae of scyphozoans). Worm colony and coral polyp are not related.

Answer:

A. A hydra