What is usually included in a yacht rental package on CharterClick — which “extras” should you check in advance?

Last time I booked a small boat for a day trip in Greece, I was surprised by how many “hidden extras” popped up when we arrived. Things like fuel, snorkeling gear, and even towels weren’t included, and it added up quickly. Now I’m thinking of doing a proper yacht charter in Seychelles with my family, but I don’t want to get caught off guard again. I’ve seen that some companies include the crew, basic equipment, and safety gear, but then ask extra for food, fuel, or water toys. Does anyone know what CharterClick usually provides as standard and what’s considered optional add-ons? I’d really appreciate some real experiences before I book.