The “curacha” or spanner crab (Ranina ranina) is a highly-prized marine crab that is steamed or boiled when served as a delicacy not only in the seafood restaurants of Zamboanga City but also in Metro Manila. The crab is relished for its meat which is similar to that of the blue swimming crab. Unlike the latter, however, the spanner crab’s color is red even before it is cooked.

Guerrero, R. D., III. (2019, March 9). Managing our "curacha" fishery. Manila Bulletin, p. B-5.