Mears website says $41 for a van from Cabana Bay hotel to Discovery Cove http://secure.mearstransportation.com/Reserve/selectservice.aspx
But Universal Hotels offer free transport to SeaWorld (https://www.universalorlando.com/Hotels/CBBR/Hotel-Services-Information.aspx) and then Discovery Cove offer a free shuttle from SeaWorld (https://discoverycove.com/en/premier-planning/faqs/#gpi19)