Eels are both freshwater and marine fish. Eels spawn and reproduce in the deep sea and grow in freshwater environments.

Eels grow on land in rivers and streams, migrate to spawning grounds in the ocean to lay their eggs when they are mature, spawn once in their lives, and die after spawning. This mode of life, in contrast to the anadromous nature of salmon, is known as descending migratory (Catadroumous).

Its life history is divided into six different developmental stages, and in order to adapt to different environments, the body size and color of the different stages change dramatically:

1. Egg-stage: Located in deep-sea spawning grounds.

2, Leaf eel (Leptocephalus): in the ocean with the current long-distance drift, at this time the body is flat and transparent, thin as a willow leaf, easy to follow the waves.

3, Glass eel (Glass eel): in close proximity to coastal waters, the body turns into a streamlined, reduce resistance, in order to get out of the strong currents.

4. Eel threads (Elvers): When entering estuarine waters, black pigmentation begins to appear, but they also form a source of catch for eel fry in the aquaculture industry.

5. Yellow eel (Yellow eel): During the growth period in the river, the belly of the fish appears yellow.

6. Silver eel: At maturity, the body of the eel turns silver-white, similar to that of a deep-sea fish, while the eyes become larger and the pectoral fins wider, so that the eel is able to swim back to the deep sea to spawn.

Expanded Information:

1, food value

Eel nutrients than sea bass, chicken, beef, etc. much higher, vitamins, minerals and trace elements Content is more land animals can not be compared. Scientific studies have shown that eel is one of the fish with the highest content of EPA and DHA, which can not only reduce blood lipids, anti-atherosclerosis, anti-thrombosis, but also replenish the brain with essential nutrients.

DHA can promote adolescent brain development, enhance memory, but also help the elderly to prevent brain function decline and Alzheimer's disease. Medical experts have also found that eel has the beneficial components of both fish oil and vegetable oil, and is an ideal food for supplementing essential fatty acids and amino acids.

Eel's zinc content, highly unsaturated fatty acid content and vitamin E content are very high, can assist in the prevention of aging and atherosclerosis, thus having a skin care and beauty effects.

2, nutritional value

Rich in vitamin A and vitamin E, the content is 60 times the ordinary fish and 9 times. Among them, vitamin A is 100 times that of beef and more than 300 times that of pork. Rich in vitamin A, vitamin E, for the prevention of vision degeneration, protect the liver, restore energy has great benefits . Other vitamins such as vitamin B1, vitamin B2 content is also very rich.

Eel is also rich in "good" fat, which contains phospholipids, an indispensable nutrient for brain cells. In addition, eel is also known as "brain gold" DHA and EPA (deep-sea fish oil components, DHA for docosahexaenoic acid, EPA for eicosapentaenoic acid), the content of other seafood, meat are higher, and DHA and EPA has been proved to have an important role in the prevention of cardiovascular disease.

In addition, eel also contains a lot of calcium, which is also effective in preventing osteoporosis. The most exciting thing for women is that the skin and meat of eel are rich in collagen, which can enhance beauty and slow down the aging process, so it is called "edible cosmetics".

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