Question

Name the ctenophora which has nematocyst???

Answer 1

The name is a reference to the comb-like ciliary rows. The ctenophores are diploblastic with a modified radial or biradial symmetry. Their tentacles (see figure A above) have adhesive structures called colloblasts that do not seem to be homologous to the nematocysts (=cnidae) of the Cnidaria.

Answer 2

They have 8 bands of compound cilia, "combs", that beat in metachronic waves. Another difference between cnidarian medusae and ctenophores is that cnidarians, as the name indicates, have stinging cells, nematocysts, used to capture prey and for defence. Ctenophores do not have nematocysts.

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