@article{fdi:010095479, title = {{M}edusae ({C}nidaria) of {R}eunion {I}sland ({S}outh {W}est {I}ndian {O}cean) : diversity, abundance and distribution}, author = {{B}ourmaud, {C}. {A}. {F}. and {S}lobodov, {S}. and {G}uilhaumon, {F}ran{\c{c}}ois and {G}oy, {J}. and {G}ravier-{B}onnet, {N}.}, editor = {}, language = {{ENG}}, abstract = {{N}umerous studies have been conducted on the benthic stages of {M}edusozoa in {R}eunion {I}sland, but none on the pelagic stages. {T}his study is the first to investigate the shallow waters of the island for the diversity, abundance, and spatio-temporal distribution of jellyfish. {D}uring a one-year survey, samples were collected with a plankton net weekly or biweekly at four sites (two reef/two non-reef) and two depths (10/50 m). {O}f the 267 samples, 3450 medusae were sorted and 56 species identified. {T}he meroplanktonic {H}ydroidolina ({A}ntho- and {L}eptomedusae) were the most diverse (38 species), while the holoplanktonic {T}rachylinae (13 species) were the most abundant. {H}ydromedusa species richness was higher at coastal stations than offshore, but similar between reef and non-reef sites. {T}here was no significant variation in species richness or abundance between months or seasons. {I}ncluding some other catches, the total number of species reached 62. {E}ight species are new records for the {I}ndian {O}cean (all {A}nthomedusae). {I}ndian {O}cean literature references are given in the species list, and some photographs are provided. {T}his initial study, which greatly expands the local hydrozoan fauna knowledge, will serve as a reference for future research, especially regarding climate change and coastal management in {R}eunion {I}sland.}, keywords = {{M}edusozoa ; {H}ydromedusa ; {H}ydroidolina ; {T}rachylinae ; species richness ; abundance ; seasonality ; coral reefs ; {I}ndian {O}cean ; {OCEAN} {INDIEN} ; {REUNION}}, booktitle = {}, journal = {{D}iversity}, volume = {17}, numero = {10}, pages = {694 [43 p.]}, year = {2025}, DOI = {10.3390/d17100694}, URL = {https://www.documentation.ird.fr/hor/fdi:010095479}, }