Critter Science

The Science of Animals

sea turtle

The Docile Sea Turtle

There are only seven known species of sea turtle existing today and six of these are found around Australian waters. They are the green sea turtle, the loggerhead, the olive ridley, the hawksbill, the flatback, and the leatherback turtles. Most sea turtles are found in warmer, tropical ocean waters and thus they are predominantly found in northern Australian waters. Read more about these fascinating critters.

First the Stats…

Scientific name: Chelonioidea
Weight: Up to 1,500 lbs
Length: Up to 9 feet
Lifespan: Up to 80+ years

Now on to the Facts!

1.) Their diet typically consists of jellyfish, seaweed, shrimp, crabs, sponges, snails, algae, and mollusks.

2.) Sea turtles have been around for an estimated 220 million years!

3.) Accidental capture and entanglement in fishing gear (also known as bycatch), the loss of nesting and feeding sites to coastal development, poaching, and ocean pollution, and plastic which has caused a huge deficit to sea turtle populations.

4.) Most of what we know about sea turtle behavior is gathered by observing hatchlings and females that leave the water to lay their eggs. Males, however, never leave the water.

5.) Sea turtles can migrate long distances between their feeding grounds and their mating-nesting sites, with record distances longer than 1,615 miles!

But wait, there’s more on the sea turtle!

6.) They typically just meander through the ocean, but if need be, they can reach speeds of up to 22 mph!

7.) Females travel 1,000s of miles from their feeding grounds back to the beach where they hatched every two to four years to lay eggs.

Did you know…?
The temperature of the sand surrounding the eggs determines the gender of the turtle: below 85ºF typically means a male; above 85ºF means you’ll get a female. This is the case in other turtle species as well.

8.) After mating in the shallow water offshore, the female crawls onto the beach, digs out a nest with her flippers, lays a clutch of about 115+/- eggs, then she covers the eggs with sand and returns to the sea. The hatchlings are self sufficient and totally on their own. Not much of a motherly nurturing instinct, eh?

9.) After about 2 months, the hatchlings emerge using a special “egg tooth” to break through their shells and leave their eggs. However, when they do, the mad dash is on, and they must quickly make the hazardous journey over the sand to the ocean, avoiding predators like birds, wild dogs, crabs, lizards, and poaching humans along the way!

10.) Once they reach the ocean, their fight isn’t over. Now they have to fend off predatory fish, sharks, and human-based threats, like fishing nets and gear, as well as pollution.

Now a Short Sea Turtle Video!

Learn more about all kinds of cool critters here.

Be sure to comment below!

Critter Man

With over 40 years of critter experience to my credit and hundreds of zoology teaching hours to people around the world, I have amassed not only a continuing thirst for critter knowledge but a desire to teach others all I can about the majesty and wonder of our natural world. Critter Science is a culmination of such knowledge.I have hands on as well as book acquired intel on all kinds of critters. Whether they're on land, sea, or air.I will never say that I know everything about all animals. That's impossible, even for a savant. But, that being said, ask me any animal question and I'll answer it. If I don't know the answer, I'll get an answer for you!Let it be said that I have been oft times accused of loving animals more than I love people. I can neither confirm nor deny this.

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