Sertularia are members of the Protista kingdom. This is an example of the egg-producing gonophore.
H. Alleyne Nicholson, An Introductory Text-book of Zoology(Edinburgh:William Blackwood and Sons, 1971) 34
1183×2400, 2.7 MiB
504×1024, 56.4 KiB
315×640, 26.7 KiB
157×320, 9.4 KiB