A scientist is observing an invertebrate animal that she collected in shallow salt water. The animal has a hollow central cavity and a gut. Which animal is the scientist most likely observing? a cnidarian, because it has a gut a cnidarian, because it was collected in shallow salt water a sponge, because it has tissue layers a sponge, because it is an invertebrate

Well, cnidarian would be located in the water, of course, and not only this, but based on my research, this kind of invertebrate animal would be located in the (fresh water) which would change a lot of areas in this aspect. I believe that it would actually be the following sentence as it would read: "a cnidarian, because it was collected in shallow salt water". I've read that salt water, can actually make you loss your skin, your gills, and other parts in the body of an animal such as a cnidarian. And which this would be the reason to why I would think this. And because of this, knowing this kind of animal, this would then make this animal want to have a gut, and a cavity and so on.