The life cycle you described, which includes spawning, larvae, benthic polyp that forms a colony, budding, juvenile, and adult stages, is characteristic of anemones.
Anemones are part of the phylum Cnidaria and have a life cycle that incorporates both a sexual stage (spawning) and an asexual stage (budding). Jellyfish also have complex life cycles, but they do not involve a benthic polyp forming a colony in the same way anemones do. Squid and cuttlefish primarily reproduce through direct development without a polyp stage. Therefore, the correct answer is:
- anemone.