3d_(artwork)9:16anthroanthrofiedbeachbig_breastsbikinibreastsclothedclothingcrossed_legsdigital_media_(artwork)duoequidequineexposed_breastsfemalefemale_focusfriendship_is_magichasbrohi_reshornlegs_in_watermammalmature_anthromature_femalemuhjobmy_little_ponymythological_creaturemythological_equinemythologynipplespartially_clothedpartially_submergedprincess_celestia_(mlp)princess_luna_(mlp)seasidesibling_(lore)side-tie_bikiniside-tie_clothingsister_(lore)sisters_(lore)sittingsolo_focusstring_bikinisubmerged_legsswimwearteasingtied_bikinitied_clothingtwo-piece_swimsuitwaterwinged_unicornwings