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ABSTRACT
The new species Upeneus pori is common in the Red Sea and as a result of Lessepsian (or Suez Canal) migration, it is also common in the eastern Mediterranean. Usually it has been quoted in this area under the name of U. asymmetricus Lachner, described originally from the Philippine Islands. Both species have seven spines in the first dorsal fin, usually three scales between the two dorsal fins and similar gill rakers counts. They differ, however, in several characters: in U. pori sp. n. head and barbels are shorter; the upper lobe of the caudal fin has 4–7 bars rather than 3–4 bars as in asymmetricus, and crossbars on the lower lobe of the caudal fin are interrupted by a brown stripe. Diagnostic characters are given in order to distinguish between the new species and the congeners with seven spines in the first dorsal fin.