The dwarf sanjika (Opsaridium tweddleorum) is an African freshwater fish species in the family Danionidae. It is found in Malawi and Mozambique, living in Lake Malawi and the lower Zambezi River.
This species reaches a length of .
The fish is named in honor of Denis (b. 1949) and Sharon Tweddle, a husband and wife, because of their contributions of study specimens, and color slides to the study of fish of Malawi.