Mollusks (cephalopods), which include octopus, cuttlefish, cuttlefish, and nautilus, are cephalopods. These are ancient animals found in all seas of the world that are believed to have evolved 500 million years ago. They include many of the most intelligent species on the planet.
A group of scientists has discovered an unknown species of octopus on Dongshan Island, Fujian Province, China.
Callistoctopus xiaohongxu is a small to medium-sized octopus, weighing less than 40 g in adulthood. This species, known to the locals but misidentified for a long time, has smooth skin and a reddish-brown color.
Scientists have revealed the identity of the Chinese octopus
(Photo: Matthew Villa/Via Unsplash)
Locals and fishermen have been familiar with this species for a long time, but they have been mistaken as a small species of the common long-armed octopus (small octopus), which is traded all over the country, according to science daily.
The group of scientists from Ocean University in China obtained a set of samples from Dongshan Seafood Market Pier that had been misdiagnosed as “O” by local residents.
Upon beginning to investigate them, it became clear that this was a unique and distinct species. Callistoctopus xiaohongxu has been given its own name, and a scientific description has been released in the open-access journal ZooKeys.
The scientific name xiaohongxu is a phonetic translation of the original Chinese name for the species in Zhangzhou, where it was discovered.
It refers to its smooth skin and reddish-brown color, which are its distinguishing characteristics. In adulthood, C. weighs less than 40 g. The xiaohongxu is classified as a small to medium sized octopus. The researchers also reported that it was the first new species of Callistoctopus discovered in China.
In the Chinese seas, more than 130 distinct species of cephalopods have been identified. Due to the influence of strong warm currents, the southeast seas of China provide optimal natural conditions for extensive marine biodiversity, and the discovery of C. Xiaohongxu confirms the enormous diversity of biota in the Southeast China Sea.
Behaviour, reproduction and conservation status of cephalopods
Cephalopods are highly intelligent ocean-dwelling organisms that range in size and lifestyle greatly, ThoughtCo.
They all have at least 8 arms and a beak that resembles a parrot. They have three hearts that circulate in blue blood, which is copper blood instead of iron like human blood.
Some cephalopods feature sucking claws, camera-like eyes, skin discoloration, and complex learning behaviors.
Many cephalopods, especially octopuses, are skilled problem solvers and escape artists. They may cast off a cloud of ink, bury themselves in sand, change color, or even let their skin bioluminescent, or emit a light like a firefly, to hide from predators or prey.
The color changes in the skin are caused by the expansion or contraction of pigment-filled sacs in the skin known as chromatophages.
Cephalopods have both male and female sexes, and mating usually involves courtship, which may include skin color changes depending on the species.
Some species of cephalopods gather in large numbers to mate. The male transfers a bundle of sperm to the female through the mantle opening using a modified penis or arm; Females are polyandrous, which means that they can be fertilized by several men.
Females deposit large yolk eggs in clusters on the ocean floor, producing 5 to 30 egg capsules each containing four to six embryos.
Cephalopods reproduce rapidly, and poaching is rarely a problem. Seashell nautiluses are highly regarded in the United States and internationally, and although they are not on the IUCN Red List, they are already protected under the Convention on International Trade in Endangered Species (CITES) since 2016.
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