Sinamia is an extinct genus of freshwater amiiform fish which existed in China, Japan, South Korea[1] and North Korea[2] during the Early Cretaceous period.[3] Like the related bowfin, it has an elongated low-running dorsal fin, though this was likely convergently evolved.[4]
^Kim, Phyong-Song; Ri, Sang-Ryong; An, Yong-Il; Kim, Myong-Hak; Pak, Kwang-Hyok; Jo, Kang-Song; So, Kwang-Sik (November 2023). "First occurrence of Sinamia (Amiiformes, Sinamiidae) from the Upper Cretaceous Seson Formation, Democratic People's Republic of Korea". Cretaceous Research. 151: 105633. doi:10.1016/j.cretres.2023.105633.