Reptilia · Testudines
Caretta carettaLinnaeus, 1758
Loggerhead
Photograph by Jan Ebr & Ivana Ebrová, CC BY, via iNaturalist
An active by day or night, meat-eating turtle from the Marine region, reaching 213 cm across the shell.
Also called Loggerhead Seaturtle.
Reptilia › Testudines › Cheloniidae › Caretta
- Grows to
- 968mm
- greatest recorded
- Eats
- Carnivorous
- Active
- Cathemeral
- Lives up to
- 76years
What is known
31 sourced facts, each taken from a named scientific dataset. How to read these.
Cited from a dataset unless a row is marked otherwise.
Standing in the world
- Conservation status
- Vulnerable
- Population trend
- Decreasing
The animal itself
- Colour on the back
- Brown, Yellow
- Pattern on the back
- Uniform
- Pupil
- Round
- Venomous
- No
- Fangs
- None
- Longest recorded life
- 76years
- Body temperature when active · measured in the wild
- 27.51°C82 °F
- Body temp in the wild · mean, when active
- 10.5–30°C51–86 °F
mean body temperature of active individuals in nature
body temperature of active animals in nature
Size
- Length nose to tail · greatest recorded
- 968mm3 ft 2 in
- Shell length, front to back · greatest recorded
- 2130mm7 ft
- Body mass · greatestcomputed
- 250,000g551 lb
- Body mass · a typical adult
- 156,500g345 lb
- Body mass at hatching
- 36.5g1.3 oz
total length, tail included — Colston, Kulkarni, Jetz, and Pyron, 2020, BMC Evol. Biol., 20:81
straight carapace length, measured in a line rather than over the curve
largely converted from length by allometry in the source
AnAge rates this record "acceptable"
How it lives
- Diet
- Carnivorous
- How it hunts
- Active foraging
- Active
- Cathemeral
- Where it lives
- Marine
- Habitat
- Marine Neritic
- Region
- Marine
Invertebrates
Breeding
- Reproduction
- Oviparous
- Sex decided by
- Temperature
- Gestation or incubation
- 60days
- Average clutch
- 115eggs
- Clutches in a year
- 1.29per year
- Age at first breeding · female
- 3650days
Naming and history
- Subspecies
- No
- Described by
- Linnaeus
- Moved to another genus · since it was first described
- Yes
- Described in
- 1758
Keeping one
Loggerhead is assessed as Vulnerable on the IUCN Red List. Species at risk in the wild are often covered by CITES and by national law, which decide what may be bought, sold, moved across a border or kept at all — and captive-bred and wild-caught animals are usually treated differently. Check the rules where you are before acquiring one. Nothing below is a judgement about keeping this species; it is what a published welfare standard says about space, and what the animal itself was measured doing.
No enclosure size is given here
Sea turtles are not kept privately. Both standards cover them only for public aquaria, so no enclosure size is given here.
Active animals measured in the wild averaged 82 °F (27.5 °C).
Mean body temperature of active individuals measured in nature. A measurement of the animal, not a setting for a thermostat.
Feeding
A prey item should be no wider than the space between the animal's eyes.
Widely used across reptile husbandry references. The stated reason is that the gap approximates the width of the throat, so wider prey is associated with impaction. This is established practice, not a measurement.
12332kJ per day
Worked out for an animal of 250,000 g, the heaviest recorded for Loggerhead — so it is the top of the range, not a figure for a particular animal. Weigh yours and the number will be lower.
An upper estimate, not a feeding target, and not veterinary advice. The equation covers only what an animal burns staying alive, so a growing, gravid or recovering animal needs more — and it was measured on wild animals, which move far more than one in an enclosure. Body condition and a vet who knows the species are what a feeding decision should rest on. Where this comes from.
What nobody knows
These are not gaps in our research. No scientific dataset records them for this species — and saying so is information you cannot get from a reference that simply leaves a field out.
- — Still living
- — Length snout to vent · greatest recorded
- — Length snout to vent · adult female mean
- — Length snout to vent · adult male mean
- — Length snout to vent · adult mean
- — Female length · mean, nose to tail
- — Length nose to tail · adult male mean
- — Length nose to tail · adult mean
- — Largest female · snout to vent
- — Largest male · snout to vent
- — Largest female · shell length
- — Largest male · shell length
- — Hatchling length · snout to vent
- — Hatchling length · nose to tail
- — Largest juvenile · snout to vent
- — Largest juvenile · shell length
- — Egg length
- — Egg width
- — Body mass · adult female, mean
- — Preferred body temperature · chosen in a laboratory gradient
- — Eats arthropods
- — Eats vertebrates
- — Eats plant matter
- — How the young develop
- — Smallest clutch recorded
- — Largest clutch recorded
- — Mean clutch · smallest reported
- — Mean clutch · largest reported
- — Clutches a year · fewest
- — Clutches a year · most
- — First breeds from · youngest recorded
- — First breeds by · oldest recorded
- — Hatchling length · smallest recorded
- — Hatchling length · largest recorded
- — Mature from · youngest recorded
- — Mature by · oldest recorded
- — Size at maturity · smallest recorded
- — Size at maturity · largest recorded
- — Limbs
- — Status assessed · the year the Red List last looked
- — Red List criteria
- — Biome
- — Active season · shortest recorded
- — Active season · longest recorded
- — Density · lowest recorded
- — Density · highest recorded
- — Home range · largest recorded
- — Suborder
- — Infraorder
- — Type locality
- — Active in
- — Mainland or island
- — Lowest it lives · above sea level
- — Highest it lives · above sea level
- — Range size
Others in Cheloniidae
Take this data
Everything on this page is available as data under CC BY 4.0 — use it freely, credit it, no permission needed.
This species as JSON · the whole dataset
Cite this page
The Reptile & Amphibian Encyclopedia (2026). Caretta caretta. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/caretta-caretta
@misc{caretta_caretta_2026,
title = {Caretta caretta},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/caretta-caretta}
}Sources
- Oskyrko, O. et al. (2024). ReptTraits: a comprehensive dataset of ecological traits in reptiles. Scientific Data. Used under CC BY 4.0.
- AnAge, Human Ageing Genomic Resources (de Magalhães et al.), used under CC BY 3.0.
- Catalogue of Life (dataset 3LR), used under CC BY.
- Moura, M. R. et al. TetrapodTraits: a database of 33,281 tetrapod species. Used under CC BY 4.0. Observed values only; this encyclopedia does not publish its imputed predictions.