One amazingly interesting creature is the octopus; this cephalopod can twist and turn its body into many shapes, suction to all types of surfaces, and use a cloud of ink to distract predators. This week, researchers uncovered the California two-spot octopus’s ability to sense light through its skin.
When the scientist shone a beam of light on the skin of an octopus the chromatophores (pigmented structures in the skin) expanded and the skin changed color. When the light was turned off, the chromatophores contracted again and the octopus was back to its original color. Why does this happen? Scientists determined that the octopus’ skin has proteins called opsins that work with the chromatophores for this reaction to occur.
(Read more about the experiments here)
Changing colors is nothing new in the octopus species; they can become red with anger, or transparent in sunlight. The more tools the creature has to camouflage itself the better chance for survival in the wild depths of the ocean where predators are abundant.
To learn more about the octopus or how other animals use light in the depths of the ocean here is a short underwater reading list!
Octavia and her Purple Ink Cloud
Octavia Octopus and her sea-animal friends love playing camouflage games to practice how they would hide from a “big, hungry creature.” Octavia, however, just cannot seem to get her colors right when she tries to shoot her purple ink cloud. What happens when the big, hungry shark shows up looking for his dinner? This creative book introduces basic colors along with the camouflage techniques of various sea animals; a great introduction to marine biology!
A Day in the Deep
Travel deep into the ocean way below the surface and you’ll encounter some creatures you never knew existed! This book takes you on a journey through the dark depths of the sea towards the ocean floor. Most ecosystems need sunlight, but deep in the ocean where the sun doesn’t shine animals have adapted some very interesting ways to see, protect themselves, and eat. Discover the unique habitats, adaptations, and food chains of these deep -sea creatures.
Ocean Hide and Seek
The sea is a place of mystery, where animals big and small play hide and seek! Can you imagine a shark hiding in the light? What about a clownfish in plain sight? Don’t believe it? Then, sink into the deep blue sea with Jennifer Evans Kramer and Ocean Hide and Seek! Surround yourself with the vibrant ocean illustrations of Gary R. Phillips. The ocean is an old, old place, and the exotic animals in the depths have learned to adapt to their surroundings to survive. Can you find the creatures hidden on every page? Or will you, too, be fooled by an ancient, underwater disguise?