No shoes needed but crocs should work just fine. Water shoes are great too. The area you’ll be snorkeling is mostly clear beach with relatively minimal coral. That also means relatively fewer fish to see. Lots of tourists but still nice but I didn’t see anything.

We were inspired by the trio to return the following day to adjacent beaches which had more coral and shoes were needed there. TONS of tropical fish in/around the coral areas, which are super sharp so shoes a must.