THE ANIMAL FILES

Green sea turtle

Chelonia mydas

The green in the name is not a promise about the shell.

Green sea turtles are named for greenish body fat, not a uniformly green shell. Young turtles use open-ocean habitats before moving toward coastal feeding grounds, where many adults graze on seagrasses and algae. Eggs are laid on beaches.[1]

Follow the evidence ↓
Green sea turtle
Image: Charles J. Sharp · Commons · CC BY-SA 4.0
Name origin
Greenish fat rather than a uniformly green shell[1]
Egg location
Beaches above the water[1]
Adult feeding grounds
Often shallow coasts with vegetation[1]

A name linked to internal colour

The common name refers to greenish body fat, not a requirement that the outer shell look green. External appearance can therefore mislead anyone treating a common name as a colour chart.[1]

The shoreline is only part of the map

Adults often feed in shallow coastal environments, including seagrass areas and bays, while eggs are laid on beaches. Young turtles can use open-ocean settings before becoming more associated with coastal habitats.[1]

A grazing adult has a dietary history

Food changes with age. Young turtles use more animal material, while many adults feed heavily on seagrasses and algae. Serrated jaws help process this vegetation.[1]

A COMMON MIX-UP

Must a green sea turtle have a bright green shell?

No. Its common name refers to a greenish layer of fat within the body. The origin of a name should not be mistaken for a guarantee about the colour visible in every photograph.[1]

TRY A LITTLE REASONING

Why would a coastal feeding area not replace a nesting beach?

Reveal the explanation

Those places serve different stages and tasks. Feeding vegetation supports adults in the water, while eggs develop on land; a complete life-history account needs both rather than choosing one as the species’ only habitat.[1]

Sources & editorial notes

Adapted and translated from the cited Wikipedia revisions, with source-linked reasoning. Image credit and licence are listed separately above.

Adapted and translated from Wikipedia contributors; exact revisions are linked below. CC BY-SA 4.0

  1. Wikipedia contributors — Green sea turtle (fixed revision; adapted and translated)
  2. NCBI Taxonomy — Chelonia mydas (identity and classification)

Last fact check:

One discovery leads to another

Loggerhead sea turtleStrong jaws meet a life that begins among floating weeds.Caretta caretta ↗Hawksbill sea turtleA narrow hooked beak reaches food among reef structures.Eretmochelys imbricata ↗Olive ridley sea turtleA nesting crowd begins in the sea.Lepidochelys olivacea ↗