In addition to relying on vision, fish feeding is also related to smell and taste.Although the artificial bait input in aquaculture is comprehensive, it is not enough to arouse the appetite of aquatic animals.Trimethylglycine is an ideal attractant because of its unique sweet taste and sensitive umami taste of fish and shrimp.  

The addition of 0.5% ~ 1.5% betaine in fish feed can stimulate the smell and taste of all fish and shrimpsand other crustaceans,which plays an important role in inducing feed and improvingpalatability of feed, shorten feeding time,promoting digestion and absorption,accelerating the growth of fish and shrimp, and avoiding water pollution caused by feed waste.  

Adding betaine in the feed,which can shorten 1/3 to 1/2 feeding time and increase the intake of macrobrachium rosenbergii.The feed containing betaine hasobvious bait effect on carps and wildlabeo. Betaine can also enhance the taste sensation of other amino acids to fish, and enhance the effect of amino acids.  

Betaine has effects on increasing appetite andenhancingdisease resistance and immunity,also can solve the problems ofrefusing food to baits by sick fish and shrimp and compensate for the reduced food intake of fish and shrimp under stress state.