French Polynesia

Merlin's Sentience: The Story of a Sea Turtle

Merlin, the sea turtle, illustration by Ila France Porcher
Merlin, the sea turtle. Illustration by Ila France Porcher

Sighting a sea turtle on a dive is always a pleasure. However, few know much about what they are like as animals. Being reptiles, it is assumed that they are essentially on automatic—emotionless and thoughtless. But we changed our minds about that when Merlin came. Ila France Porcher relays the tale of rehabilitating a sick sea turtle in Tahiti, at a time when turtles were often hunted for food.

Juvenile clownfish exposed to artificial light at night die sooner than those exposed to natural light at night.
Juvenile clownfish exposed to artificial light at night die sooner than those exposed to natural light at night.

No artificial lights for Nemo, please!

Scientists have discovered that clownfish living closer to shore die sooner than their counterparts found farther offshore due to the difference in the amount of artificial-light exposure.

The more artificial light they were exposed to, the higher the mortality rate.

The study focused on the reefs around Moorea in French Polynesia. It involved exposing 42 juvenile clownfish to either artificial light at night (ALAN) or natural light (meaning, moonlight!) in the lagoon. Each of the 42 territories had a magnificent sea anemone.