This was in a tidal area about 3 ft. deep.
I think this is perhaps the Red sea anemone (Actinia tenebrosa), but it looks slightly different, they're usually smooth walled when closed up. (In tidal rock pool)
Rainbow coloured anemone, and I think a yellow Kowhai seed.
Anthozoa is a class within the phylum Cnidaria. Unlike other cnidarians, anthozoans do not have a medusa stage in their development. Instead, they release sperm and eggs that form a planula, which attaches to some substrate on which the cnidarian grows. Some anthozoans can also reproduce asexually through budding. More than 6,100 species have been described.