Congrats on getting the pool up and running!!

Perhaps you're talking about the 'eyeballs' (directional return inlets) - if the number of these matches the number of returns, that's probably what they are.

BE CAREFUL! If you have a suction port that they could fit into, eyeballs on a suction port can rip the skin off your finger down to the bone, if you poke your finger into it (I call them 'piranhas' )

If they're something else - post a pic and we'll help you figure out what you're dealing with.