The scientific name of the blue inverted hanging is "yellow-tailed para-spiny tailfish", which is a brightly colored and larger species in the upside-down hanging. The blue upside-down adult fish can reach a length of up to 31 centimeters, and the juvenile and adult fish are basically the same in body shape and pattern. Due to their bright body color, they have become a popular fish species in aquariums.
Body shape characteristics
The blue inverted body is flattened on the side and nearly oval; the body is mostly bright royal blue with dark black hook-like spots on the side of the body; the dorsal and fins are royal blue with black edges; the tail stalk and tail fin are bright yellow, and the tail fin edge is black, which is connected to the black area of the fish body, and is isolated behind the fish body to form a triangular yellow area. In general, the body color of the blue inverted juvenile fish is very bright, and gradually fades as it grows.
Activity habits
Blue inverted hangings are oceanic benthic fish that occasionally travel alone, mostly in pairs or in small groups. Near the reef, they form a protective layer, and each member of the group has a sharp and poisonous tail spine to deal with potential predators, so few predators will enter the center of the fish to hunt. They also congregate with other spinytail fishes, such as ctenophores, multi-plate shieldtails, and high-fin spinytails.
The role of the caudal spines
When fear strikes, the blue upside down, especially its juveniles, will hide between the branches and forks of the coral, extend the tail spines to the coral bushes, and stabilize the posture with the coral headland. Doing so prevents intruders from dragging them out of their hiding places. Once the predators find them, they will fall to the side and "pretend to be dead", often mistaking the predators for death and abandoning them. The blue upside-down tail spines can not only be used to defend against enemies, but also serve as a warning to males when they encounter each other and clash. As the conflict escalates, the blue color of the blue upside-down body table changes. They get close to each other and try to hurt each other with stingers until they defeat each other, and the winner usually wins a larger breeding area.
The deception of "pretending to be dead"
When fear strikes, the blue upside down, especially its juveniles, hide between the branches and forks of the coral, extend the tail spines towards the coral bushes, and stabilize their posture with the coral headlands. Doing so prevents intruders from dragging them out of their hiding places. Once the predators find them, they will fall to the side and "pretend to be dead", often mistaking the predators for death and abandoning them.
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Huilan Shibei
It is found in tropical waters of the Pan Pacific Ocean.
Its natural habitat is the clear reef waters where currents pass by.
Food Omnivorous, feeding mainly on zooplankton and sometimes algae.
Past periods are also wonderful
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