Chelonia mydas
(Linnaeus, 1758) · speciesAt a glance
Sources16 archives
Databases and archives Chelonia mydas's data was compiled from.
WikipediaWikimedia Foundation20 languages↗
Animal Diversity WebUniv. of Michigan MZspecies account↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility227 716 records↗
OBISOcean Biodiversity Information System214 136 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI163 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics152 specimens↗
FooDBThe Metabolomics Innovation Centrecompounds↗
NPASSNat. Product Activity & Species Sourcecompounds↗
Open Tree of LifeOpenTreephylogeny backbone↗
GoaTGenomes on a Tree · Sangergenome & karyotype↗
NCBIUS National Library of Medicinegenome & karyotype↗
Tree of SexTree of Sex Consortiumgenome & karyotype↗
Paleobiology DatabasePBDB consortiumfossil record↗
WikidataWikimedia Foundationstructured facts↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
The green sea turtle (Chelonia mydas), also known as the green turtle, black (sea) turtle or Pacific green turtle,Swash, A. & Still, R. (2005). Birds, Mammals, and Reptiles of the Galápagos Islands. Second Edition. Hampshire, UK:WildGuides Ltd. p.116. is a species of large sea turtle of the family Cheloniidae. It is the only species in the genus Chelonia. Its range extends throughout tropical and subtropical seas around the world, with two distinct populations in the Atlantic and Pacific Oceans, but it is also found in the Indian Ocean. The common name refers to the usually green fat found beneath its carapace, not to the color of its carapace, which is olive to black. The dorsoventrally flattened body of C. mydas is covered by a large, teardrop-shaped carapace; it has a pair of large, paddle-like flippers. It is usually lightly colored, although in the eastern Pacific populations, parts of the carapace can be almost black. Unlike other members of its family, such as the hawksbill sea turtle, C. mydas is mostly herbivorous. The adults usually inhabit shallow lagoons, feeding mostly on various species of seagrasses. The turtles bite off the tips of the blades of seagrass, which keeps the grass healthy. Like other sea turtles, green sea turtles migrate long distances between feeding grounds and hatching beaches. Many islands worldwide are known as Turtle Island due to green sea turtles nesting on their beaches. Females crawl out on beaches, dig nests, and lay eggs during the night. Later, hatchlings emerge, and scramble into the water. Those that reach maturity may live to 90 years in the wild. C. mydas is listed as endangered by the IUCN and CITES and is protected from exploitation in most countries. It is illegal to collect, harm, or kill them. In addition, many countries have laws and ordinances to protect nesting areas. However, turtles are still in danger due to human activity. In some countries, turtles and their eggs are still hunted for food. Pollution indirectly harms turtles at both population and individual scales. Many turtles die after being caught in fishing nets. In addition, real estate development often causes habitat loss by eliminating nesting beaches.
No narrative description available for this taxon yet.
No structured trait data for this taxon yet.
Compounds documented for Chelonia mydas across natural-product and food-composition databases — not just the ~150 nutrients on a classic label ("nutritional dark matter").
Compound class profile5 classes
Documented compounds87 total
| Compound | Class | Amount | Source |
|---|---|---|---|
| Potassium | 230 mg/100g | FooDB | |
| Phosphorus | 180 mg/100g | FooDB | |
| Calcium | 118 mg/100g | FooDB | |
| Retinol | 100 IU | FooDB | |
| Sodium | 68 mg/100g | FooDB | |
| Choline | 65 mg/100g | FooDB | |
| Cholesterol | 50 mg/100g | FooDB | |
| Doconexent | 33 mg/100g | FooDB | |
| Eicosapentaenoic acid | 23 mg/100g | FooDB |
A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Chelonia mydas has left across the world's sequence archives.
At a glance
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
Besides the big genome in the nucleus, cells carry a small, circular loop of DNA inside the cell's energy factories — the mitochondria. It is inherited almost only from the mother and is a leftover from ancient bacteria that moved into the cell. The mitochondrial markers above (ND*, COX, CYTB…) are read from exactly this loop. Outer ring = one strand, inner ring = the other.
The complete instruction manual Chelonia mydas carries — its genome. We read it from three angles — how big it is, how the DNA is packed into chromosomes, and how completely it has been sequenced — and explain how to read each value as you go.
Genome sizehow big the whole instruction manual is
Measured in base pairs (bp) — the individual letters of DNA (human ≈ 3.2 Gb, a bacterium a few million). The chart places this genome on a logarithmic scale — each step to the right is ten times bigger — among reference organisms. Across species a bigger genome loosely tracks with larger cells, slower growth and lower-energy lifestyles (powered flight favours small genomes) — yet it does not imply more genes or a more advanced organism (the long-standing C-value paradox).
Chromosomes & ploidyhow the DNA is packaged
2n is the full chromosome count in a normal body cell; n is a gamete (egg or sperm), which carries half. Ploidy is how many complete chromosome sets each cell holds — 2× (diploid) is typical for animals, while higher levels (polyploidy) are common in plants. Click any value below to see the underlying records and sources.
2n 565×GoaT · Animal Chromosome Counts Database · GoaT · Tree of Sex Database · GoaT · Animal Genome Size Database +1
2n 552×GoaT · Animal Chromosome Counts Database
Sequencing statusassembly quality — how far to trust these numbers
Assembly level tells you how finished the sequence is — from fragmented contigs, through scaffolds, up to a full chromosome-level assembly. BUSCO % estimates completeness: the share of genes expected to be present that were actually found. These describe the data quality, not the organism.
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The solid bar is the fossil range: the span between the oldest and the youngest fossil that palaeontologists have assigned to Chelonia mydas. Above itBeside it, each dot is one dated fossil find — few enough to count, so they are drawn individually rather than as a graph.
How it livedPBDB
Record type441 857 records
Origin
Range
Depth
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions29 of 66 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| Sydney, AU | 533 |
| Chongqing Museumlocation not on record | 395 |
| Berkeley, US | 249 |
| Washington, US | 236 |
| CASlocation not on record | 130 |
| Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record | 99 |
| Western Australian Museumlocation not on record | 86 |
| Museum and Art Gallery of the Northern Territorylocation not on record | 52 |
| North Carolina Museum of Natural Scienceslocation not on record | 49 |
| Tapachula, MX | 48 |
| Australian National Wildlife Collectionlocation not on record | 43 |
| Puerto Ayora, EC | 39 |
| PUC-RSlocation not on record | 37 |
| Natural History Museum of Utahlocation not on record | 33 |
| Honolulu, US | 29 |
| Museo de Zoologia, Pontificia Universidad Catolica del Ecuadorlocation not on record | 22 |
| San Diego, US | 19 |
| Museums Victorialocation not on record | 18 |
| Teylers Museumlocation not on record | 17 |
| Ann Arbor, US | 17 |
| Los Angeles, US | 16 |
| National Marine Biodiversity Institute of Korealocation not on record | 15 |
| DOI/NPS, Salem Maritime National Historic Sitelocation not on record | 15 |
| Universidade Federal de Juiz de Foralocation not on record | 13 |
| DEWlocation not on record | 9 |
| New Haven, US | 9 |
| Auckland, NZ | 8 |
| Museo de Historia Natural “Gustavo Orcés V"location not on record | 8 |
| INMAlocation not on record | 7 |
| ASUlocation not on record | 6 |
| Cambridge, US | 6 |
| NSW Dept of Planning, Industry and Environmentlocation not on record | 6 |
| Natural History Museum Rotterdamlocation not on record | 5 |
| National Natural History Collectionslocation not on record | 5 |
| Brussels, BE | 5 |
| Saint John, CA | 4 |
| Seattle, US | 4 |
| Curtin Universitylocation not on record | 4 |
| SMNHTAUlocation not on record | 4 |
| Mexico City, MX | 4 |
| Natick, US | 3 |
| Wuzhou, CN | 3 |
| QVMAGlocation not on record | 3 |
| RBINS-Scientific Heritagelocation not on record | 3 |
| 3 | |
| Victoria, CA | 3 |
| Mexico City, MX | 3 |
| Buenos Aires, AR | 2 |
| Stockholm, SE | 2 |
| University of Texas at Arlingtonlocation not on record | 2 |
| Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record | 2 |
| The University of the West Indies, Trinidad and Tobagolocation not on record | 2 |
| National Museum of Natural Sciencelocation not on record | 2 |
| South Kensington, GB | 2 |
| Toronto, CA | 2 |
| Tacoma, US | 2 |
| Salzburg, AT | 1 |
| Ohio State University - Reptile Division, Columbus, OH (OSUM)location not on record | 1 |
| Società romana di Scienze naturalilocation not on record | 1 |
| Universidad Nacional de Colombia (UNAL)location not on record | 1 |
| Barcelona, ES | 1 |
| Chicago, US | 1 |
| Ugentlocation not on record | 1 |
| University of the South Pacificlocation not on record | 1 |
| Abilene Christian University Natural History Collectionlocation not on record | 1 |
| University of California San Diegolocation not on record | 1 |
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Where the DNA of Chelonia mydas was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Where its DNA was found
How strong is each trace?
Modelled climatemodelled
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.