Is cnidarians asexual or sexual

Answer 1

yes

Marine bivalves reproduce by releasing prodigious numbers of eggs and sperm into the water, where external fertilization occurs. The fertilized eggs then float in the surface Within 48 hours after fertilization, the embryo develops into a minute, planktonic, trochophore larvae. This stage is followed by another larval form, the veliger, which settles to the seabed and transforms into an adult. In freshwater bivalves, the eggs are retained in the gill chambers of the female, where they undergo fertilization and develop into a peculiar larval form, the glochidium. Upon its release, the larva attaches to passing fish, and lives as an ectoparasite for several weeks before settling.

From: http://science.jrank.org/pages/944/Bivalves.html

Answer 2

Cnidarians have both sexual and asexual reproduction cycles. The polyp cycle can reproduce by budding off an exact clone of itself (but smaller)--this is asexual reproduction; they can also produce a cloned larva asexually.

Answer 3

Yes; although they always have to reproduce also sexually during their cycle.