Dive center, PADI 5 star in Lombok – Gili islands

Green turtles and Hawksbill turtles: how to distinguish them?

Green turtle and Hawskbill turtle

There are many sea turtles around the Gilis and Lombok. They are so abundance that it is rare to do a dive without meeting one. Often, it is possible to dive with ten turtles.

There are two turtle species living in north-west of Lombok – Gili islands:

  • Green turtles – Chelonia mydas
  • Hawksbill turtles – Eretmochelys imbricata
Green and Hawskbill sea turtles in Gili islands
Green and Hawskbill turtles

The 2 species (like all the sea turtles) are endangered, they already disappeared in many places because of fishing, nets, collecting eggs, beach full of tourists…. For example, they are rare in Bali.

Before to explain how to recognize them, I will try to explain why they are abundance around the Gili islands.

Why are there so many Hawksbill and Green turtles around Gili islands?

The answer is easy : the human do not hunt them anymore and begun to protect and help them to grow.

The local people understand they can earn more money from tourism if there are many turtles, so :

  • Some nurseries were created for the baby turtles. Now, the nurseries are closed because they are not good for the baby turtles.
  • whenever turtles nesting is sighted, nets are placed around the nested areas to prevent somebody from taking the eggs.
Giant green turtle in Lombok Indonesia
Giant green turtle

For the locals, using sea turtles is an easy and quick way to earn money :

  • small pool (usually too small and too shallow) with baby turtles is a way to attracted the tourists.
  • release young turtles is also an efficient advertising and tourist who wanted to release a baby turtle has to pay a fee.
  • keeping a turtle nursery as a way to earn money. Tourists gave or “donate” money during their visit.
  • the turtle is the main goal of the tourists, everybody wants to dive or snorkeling with turtles.

The turtles are the main sea attraction for scuba diving in Lombok and gili islands.

face of a Hawskbill turtle
I am a tourists attraction 😀

This situation is precarious as long as a live turtle yields more money than a dead, they will be “protected”. If one day the tourism drops, the turtles could become again a source of calories or other (carapace…).

Indeed, turtles must serve a short-term interest, that is to earn money immediately therefore harmful but profitable attitudes persist :

  • a grapple is sometimes used so that they can disturb a turtle sleeping at the bottom so that it will swim towards the surface next to the tourists.
  • locals and tourists touching or gripping turtles are tolerated or encouraged.
  • release of baby turtles can be a disaster (especially when they have an advertising / media goal) with agonizing baby turtles, some babies were dead even before they were released.
  • destruction and harvest of eggs by the locals
  • deep-sea fishing even in forbidden areas.

Nevertheless, the result is there and it is probably the most important, these 2 species of turtles are numerous around the North Lombok and Gilis (a situation now rare in the world).

Diving with 3 sea turtles together
3 turtles: 2 Green, 1 Hawskbill

To easily discover Green and Hawksbill turtles, the northwest of Lombok is the ideal place. It is easy to see them.
And, to differentiate, these 2 species is not difficult.

How to distinguish a Green turtle and a Hawksbill turtle?

I will not be interested in the differences in shapes or numbers of scales, it is not a simple method to use.
And a Green turtle is not necessarily green (they have been named so because their flesh is greenish in color).
I only describe my personal methods to differentiate them, not a scientific description of these 2 species. For that, you need to check on Wikipedia.

2 simple basic criteria that are useful:

  • the shape of the head
  • the cleanliness of the carapace

Their mouths are very different

The mouth of Hawksbill turtle looks like a beak of a bird :

Mouth of a Hawskbill turtle
Hawksbill turtle

The mouth of a Green turtle is flat (compared to Hawksbill) :

Mouth of a Green turtle to recognize it
Green turtle

So a turtle with a mouth like a bird’s beak is a Hawksbill turtle.

Hygiene of the shell

Green turtles spend a long time cleaning their carapace. It is common to see them rub their backs against corals, artificial reefs…
As a result, Green turtles have a very clean shell.

Diving with a sleeping Green turtle
Sleeping Green turtle

Hawksbill do not seem to have this need for a regularly cleaned carapace.
As a result, their shell is often perceived as dirty.

Shell of the Hawskbill sea turtle
Shell of the Hawskbill turtle

Other easy clues:

  • Day activity :
    • a sleeping turtle = Green turtle
    • a turtle looking for food or eating = Hawskbill turtle
  • the size:
    • very big turtle, until 1,70m = Green turtle
    • medium turtle = Hawksbill turtle (Also could be a young Green turtle of course)
  • Diet, both are omnivorous with preferences :
    • herbaria for the adult Green turtle
    • sponges for adult Hawksbills turtles, we can often see them breaking coral in order to find sponges.
Another Hawskbill turtle during a dive
Another Hawskbill turtle