The Bleeker is mainly distributed throughout the tropical and subtropical coastal seas of the Indo-Pacific region. The specie is one of the heavily traded and expensive materials in traditional Chinese medicine (TCM) and has been cultured for generations in public and private aquaria, its conservation status is listed by the International Union for the Conservation of Nature (IUCN) as vulnerable. In order to meet the demand from Chinese traditional medicines, increased trade of seahorses has occurred. However, seahorse culture is a relatively new industry, and many culture problems have been encountered which need to be studied and solved. Feeding behavior is an important index of an animal's suitability to their living environment. Study on the feeding behavior has significance to the strategy of seahorse resource enhancement. In order to provide a theoretical reference for the feeding technology and culturing condition of , we examined the effect of varying water temperatures on the growth rate and feeding behavior. The experiment included four different water temperatures (18℃, 23℃, 28℃ and natural temperature CT) in the laboratory for 28 days, with three replicates per treatment. Results revealed that the growth rate was significantly different among the four treatment groups, and the fastest growth appeared at 23℃ treatment. The seahorses feeding behavior was observed more frequently at the treatment of 28℃ as compared with those at other treatments. At 18℃ and CT treatment groups, the seahorses were more entangled in the attachment, clustered distribution and insensitive to food. At 23℃ and 28℃ treatments, seahorses were more sensitivity and more frequently active feeding. In conclusion, variation in water temperature produced significant differences in seahorse growth and feeding behavior. Present study has provided the results that will be useful in rearing.