They have a mouth/anus and that is it.
Cnidarians have no gut in their body .The structure which performs function similar to gut is called gastrovascular cavity .
A medusa has a bowl shaped body with stinging cells on the tips of their tentacles. Their mouth is located on the bottom where their tentacles are, and their central cavity is in the middle of their body. A polyp's body is shaped like a vase with stinging cells at the end of their tentacles, and their central cavity in the middle of their body. Their mouth is on the top of their body with their tentacles.
MEDUSA
Coral is nor arthropod , sponge or echinoderm , A coral is a cnidarian also called a coelenterate because it possess cnidocytes , stinging cells , gastrovascular cavity ,tentacles which are cnidarian charters .
Medusa
yes, they have bilateral symmetry
like spokes on a wheel
polyp
loleveryone reading this is gonna die... lol jk
abdominal cavity
Protists do not have a body cavity.
Pisces or fish have true internal body cavity.