Aldabra Atoll - Ocean Biodiversity Information System

Aldabra Atoll

Statistics

Occurrence records	101,329
Species level	20,832
Species	1,771
Taxa	2,220
Datasets	43
Time range	1801 - 2023

Data quality

Dropped records

Dropped records	0
Not marine	156
No WoRMS match	56
No coordinates	0
Zero coordinates	0

Taxonomic issues

Marine unsure	150
No accepted name available	54,408

Missing and invalid fields

Field	Missing	Invalid
coordinateUncertaintyInMeters	92,665	0
eventDate	4,343	0
maximumDepthInMeters	100,879	0
minimumDepthInMeters	101,290	0
occurrenceStatus	1,470	0
scientificName	11	0
scientificNameID	78	32

Spatial issues

Records on land	0
More than 20 km from shore	0
Depth exceeds bathymetric depth	0

Top datasets

Dataset	Records
UNESCO eDNA expedition in Aldabra Atoll (Seychelles): April 2023 Published 2024-12-08	86,617
Reef fish abundance, size and biomass from Aldabra Atoll (Seychelles) between 2014 and 2021 collected by the Seychelles Islands Foundation Published 2023-10-24	11,543
Preliminary Report on Check Lists of Reef Fishes at Aldabra, December 2021 Published 2023-12-04	695
National Museum of Natural History Vertebrate Zoology Fishes Collections Published	451
Occurrence records of southern African aquatic biodiversity Published 2024-05-09	393
Cordio East Africa Reef Building Corals 2014 Published 2017-01-13	369
Biodiversity and ecosystem health of the Aldabra Group, southern Seychelles: Scientific report to the government of Seychelles: Fishes Checklist Published 2023-09-19	325
National Museum of Natural History Invertebrate Zoology Collections Published	265
IndOBIS, Indian Ocean Node of OBIS Published	137
Animal Demography Unit - South African Bird Ringing Unit (SAFRING) Published 2020-12-02	101

Distribution

Disclaimer: EEZ boundaries based on Marine Regions (no endorsement).

Records

Composition

detailed (class) simple

Top taxa

Unique species IUCN Red List All taxa Unique species IUCN Red List All taxa Unique species IUCN Red List All taxa

Scientific name	Records
Biota incertae sedis	54,333
Chordata Haeckel, 1874 Phylum Chordata	6,117
Animalia	5,681
Mammalia Linnaeus, 1758 Phylum Chordata > Class Mammalia	857
Cylindrotheca closterium (Ehrenberg) Reimann & J.C.Lewin, 1964 Phylum Heterokontophyta > Class Bacillariophyceae	787
Actinopteri Phylum Chordata	678
Ctenochaetus Gill, 1884 Phylum Chordata > Class Teleostei	642
Acanthurus Forsskål, 1775 Phylum Chordata > Class Teleostei	635
Arthropoda Gravenhorst, 1843 Phylum Arthropoda	578
Scaridae Rafinesque, 1810 Phylum Chordata > Class Teleostei	554

Newest species

Scientific name	Records	Since
Clausocalanus furcatus (Brady, 1883) Phylum Arthropoda > Class Copepoda	342	2023
Amphidinium massartii Biecheler, 1952 Phylum Myzozoa > Class Dinophyceae	117	2023
Spratelloides delicatulus (Bennett, 1832) Phylum Chordata > Class Teleostei	127	2023
Chelonia mydas (Linnaeus, 1758) EN Phylum Chordata	85	2023
Cylindrotheca closterium (Ehrenberg) Reimann & J.C.Lewin, 1964 Phylum Heterokontophyta > Class Bacillariophyceae	787	2023
Albula glossodonta (Forsskål, 1775) VU Phylum Chordata > Class Teleostei	154	2023
Cephalopholis urodeta (Forster, 1801) Phylum Chordata > Class Teleostei	91	2023
Rhinecanthus aculeatus (Linnaeus, 1758) Phylum Chordata > Class Teleostei	123	2023
Pelagomonas calceolata R.A.Andersen & G.Saunders, 1993 Phylum Ochrophyta > Class Pelagophyceae	102	2023
Bellerochea polymorpha Hargraves & Guillard, 1974 Phylum Heterokontophyta > Class Bacillariophyceae	115	2023

Data providers

Name	Records
United Nations Educational, Scientific and Cultural Organization	99,180
Seychelles Islands Foundation	98,485
UNESCO-IOC	86,617
UNESCO-WHC	86,617
OBIS	12,563
Intergovernmental Oceanographic Commission of UNESCO	986
National Museum of Natural History, Smithsonian Institution	716
Aldabra Marine Programme	695
South African Institute for Aquatic Biodiversity	393
Coastal Oceans Research and Development Indian Ocean	369