An octopus has three hearts—and two of them stop beating when it swims An octopus has three hearts—and two of them stop beating when it swims. This makes swimming exhausting which may be why octopuses prefer to crawl. Learn more at https://www.newscientist.com/question/many-hearts-octopus/ Dung beetles navigate by using the stars of the Milky Way Dung beetles …
Shrimp farmers will remove or crush the eyes of females to make them breed faster—this is called eyestalk ablation Called eyestalk ablation, shrimp farmers will remove or crush the eyes of females to make them breed faster. Learn more at https://naturalistsguide.com/shrimp-farmers-will-remove-or-crush-the-eyes-of-females-to-make-them-breed-faster-this-is-called-eyestalk-ablation/ Blue-ringed octopus bites are tiny and painless but can kill up to 26 humans …
The big-finned jellyhead octopus is the common name for this Cirroteuthis muelleri. The big-finned jellyhead lives along the ocean floor at depths over 6,000 ft. They can only be reached via submersible which makes them tricky to study.
The glass octopus is incredibly rare and difficult to see. They are mostly transparent except for its eyes, optic nerve, and digestive tract. Image and video courtesy of Schmidt Ocean Institute
1. Jellyfish bodies have an outer layer called the epidermis; a middle layer made of a jelly-like substance called mesoglea; and an inner layer, called the gastrodermis. Jellyfish have a very basic nervous system allowing jellyfish to smell, detect light, and respond to other stimuli. 2. Scallops clap their shells together to create a jet …