The Quintana Roo Speleological Survey have announced

We added four new underwater caves: Sistema Motz Chechen, Cenote Balam Ha, Sistema Sac Ktu Cha, and Sistema Dzonot Muyil. We have also updated information for Sistema Ox Bel Ha, Sistema Xunaan Ha, Sistema Naranjal, Sistema Balun Actun, Sistema Kuuchil Wiinik Laab and Sistema Regina caves. We will have further updates for three large underwater caves in the very near future.