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Neocaridina davidi have noticeable sexual dimorphism. The male is smaller and usually less colorful than the female. The male's tail, not being needed to carry eggs, is narrower. The female is larger and usually displays a richer, more opaque coloration, however selective breeding can produce males with similar quality of coloration.
Neocaridina is a genus of atyid shrimp, containing 26 species as of March 2023. [ 2 ] [ 3 ] Members of the genus are distributed across East Asia [ 4 ] including China, Korea, Japan, and Taiwan. Like many other Atyid shrimps, they live in freshwater habitats.
The presence of a "saddle" indicates a female has eggs in her ovaries and may be ready to mate. [5] Eggs of the Neocaridina zhanghjiajiensis shrimp. The best way to tell if a female is close to hatching her eggs is by the appearance of a set of eyes inside each egg, this is easy to spot and will let you know that the hatching is a few days later.
The decapod (crustaceans, such as a crab, lobster, shrimp or prawn) is made up of 20 body segments grouped into two main body parts: the cephalothorax and the pleon . [1] [2] Each segment may possess one pair of appendages, although in various groups these may be reduced or missing. They are, from head to tail:
When a calf is born, it usually weighs 60–70 lb (27–32 kg) and is 4.0–4.5 ft (1.2–1.4 m) long. Manatees do not form permanent pair bonds, and the male contributes no parental care to the calf, which remains with the mother for up to two years prior to weaning. Female manatees have two axillary mammary glands located under their flippers.
Like humans and other animals, fish suffer from diseases and parasites. Fish defences against disease are specific and non-specific. Fish defences against disease are specific and non-specific. Non-specific defences include skin and scales, as well as the mucus layer secreted by the epidermis that traps microorganisms and inhibits their growth.
Manatees can reach sexual maturity as early as two to five years of age. [57] Manatee gestation is around one year, and then they lactate for one to two years. West Indian manatees and African manatees can breed year-round, and a female will mate with multiple males. [58]
The dugong (/ ˈ d (j) uː ɡ ɒ ŋ /; Dugong dugon) is a marine mammal.It is one of four living species of the order Sirenia, which also includes three species of manatees.It is the only living representative of the once-diverse family Dugongidae; its closest modern relative, Steller's sea cow (Hydrodamalis gigas), was hunted to extinction in the 18th century.