Question

What do you mean by colentreta.

Answer 1

it means needle or sting cells

Answer 2

Coelenterata is an obsolete term encompassing the animal phyla Cnidaria (coral animals, true jellies, sea anemones, sea pens, and their allies) and Ctenophora (comb jellies). The name comes from the Greek "koilos" ("hollow") and "enteron" ("intestine"), referring to the hollow body cavity common to these two phyla.