Today is World Oceans Day, a global day of ocean celebration and collaboration for a better future. A healthy world ocean is critical to our survival. Together, let’s honor, help protect, and conserve the world’s oceans!
1. While the Earth’s oceans are known as five separate entities, there is really only one ocean.
2. The ocean contains upwards of 99% of the world’s biosphere, that is, the spaces and places where life exists.
3. Jellyfish are soft because they are 95% water and are mostly made of a translucent gel-like substance called mesoglea. With such delicate bodies, jellyfish rely on thousands of venom-containing stinging cells called cnidocytes for protection and prey capture.
4. Plastics & litter that make their way into our oceans are swiftly carried by currents, ultimately winding up in huge circulating ocean systems called gyres. The earth has five gyres that act as gathering points, but the largest of all is known as the ‘Great Pacific Garbage Patch’ and has grown so immense that the oceanic garbage patch can shift from around the size of Texas, to something the size of the United States.
5.The 200 or so species of octopuses are mollusks belonging to the order Cephalopoda, Greek for ‘head-feet’. Those heads contain impressively large brains, with a brain to body ratio similar to that of other intelligent animals, and a complex nervous system with about as many neurons as that of a dog.
6. Some lucky animals are naturally endowed with bioluminescence, or the ability to create light. The firefly, the anglerfish, and a few more surprising creatures use this ability in many ways, including survival, hunting, and mating.
The Glass Squid spends most of it’s life in partially sunlit, shallow waters where it’s glass-like transparency aids in it’s camoflouge. Many species are bioluminescent and have light organs underneath their eyes which are used to cancel out shadows. The only internal organ visible is a digestive gland which is equivalent to the mammalian liver.
Violet blanket octopus (Tremoctopus violaceus) is an example of extreme sexual dimorphism in a species: females can be up to 2m in length whereas males are a tiny 1-2cm creatures. Jewelled Umbrella squid (Histioteuthis bonnellii).The jewels of this squid are bioluminescent photophores that cover its body and provide the most beautiful play of colours in deep see.
From: Mollusques méditeranéens by Jean Baptiste Vérany (1851)