What are Echinoderms? | Phylum Echinodermata 

The phylum name Coelenterata (or coelenterates) is another name for the phylum Cnidaria. They can be used interchangeably.

Correct, botanically speaking it is a fruit. Interestingly, in culinary classifications they categorize food based on flavor and texture which is why there are many fruits called vegetables in common vernacular. This is from the Journal of Food Composition and Analysis 2009. Thank you.

@@HomeschoolArcade yes I researched the reason why people call certain fruits as vegetables because of the way they use them in food meals