The king weakfish, Macrodon ancylodon (Sciaenidae), is a demersal species found in South America Atlantic coastal waters from the Gulf of Paria in Venezuela to Baia Blanca in Argentina, is an economically important species because of its abundance and wide acceptance by consumers. Because of its wide distribution this fish may be subject to geographic isolation and this may have resulted in distinct populations along its coastal range. Considering that this species represents an important economic resource, confirmation of a single stock or if there are different genetic stocks spread over its wide distribution would be an important contribution to conservation policies and population management of the king weakfish (Santos and Schneider 2003).

This profile refers to its importance in Guyana fisheries and distribution in Guyanese waters is presented in map.