https://www.divecostablanca.com/
https://www.odiseadiving.com/
http://www.dive-dive-dive.eu/
https://www.firstchoicescuba.com/
7 best places on Costa Blanca to do snorking: https://www.yumping.com/noticias-aventura/las-7-mejores-playas-para-hacer-snorkel-en-la-costa-blanca–c1211