Which marine animals classify as sessile invertebrates?

Question

I know most Anthozoa (sea anemones, corals) are sessile invertebrates, but what about jellyfish and other invertebrates that have polyp and medusa stages?

Answer 1

They would only count as sessile in their polyp stages.

Don't forget sponges!

Answer 2

http://graysreef.noaa.gov/tw/inverts.htm...

http://www.bartleby.com/65/po/polypNme.h...

http://www.esu.edu/~milewski/intro_biol_...

http://www.bumblebee.org/invertebrates/C...

This will probably answer your question

Good luck, take care