A constant growing number of sharptooth lemon sharks have recently been discovered by research conducted by the Dongsha Atoll National Park. According to the research, there are about 300-400 baby sharks, 23.62-39.37 inches (60-100 cm) in length and are speculated to be living their first 3 years of life in areas around Dongsha islands. Some of them migrate alone or in groups. The alert ones appear in the coastal areas of Dongsha islands, following the tides to feed around seagrass beds.

Negaprion is a genus of requiem sharks within the family Carcharhinidae. The maximum size of this genus can reach over 118.1 inches (300 cm). There are two living species included in this genus, the sharptooth lemon shark or sicklefin lemon shark (Negaprion acutidens) and the lemon shark (Negaprion brevirostris) of the Americas. J.K. Schultz et al., (2008) used phylogeographic approaches to study the relationship of the two sharks, and found that the earliest evidence of the sharktooth lemon shark started from Australia, extending to as far as the southern Taiwan. The genetic differentiation between the two species occurred in French Polynesia where lemon sharks are found. Lemon sharks are mainly found in the waters of Mexico and the South America and have been thoroughly studied at Bimini（America）where the best and resourceful database of shark research is located. However, research about sharptooth lemon sharks are rather scant with a minority of reports indicating their genetic differentiation between the islands and mainly migrating along shores.

Commissioned by the Marine National Park Headquarters in 2012, a team led by the professor Wang Jian-Ping from NCKU Research and Development Foundation conducted an investigation into lemon sharks in the waters of Dongsha islands. After over a yearlong of investigation, the result reveals that the number of baby lemon sharks found around Dongsha islands are about 300-400, 23.62-39.37 inches (60-100 cm) in length and most are in their first 3 years of life.

The establishment of the National Park is to protect and preserve sharks and their habitats. So far in Taiwan, the Dongsha Atoll National Park has become one of the best places to observe sharks and their ecosystem. With the worldwide conservation of sharks aggressively started, the Dongsha Atoll National Park is expected to be the conservation base for sharks.