What is the fin configuration of true whiting in the genus Merlangius?

Three separate dorsal fins and two anal fins

The most reliable defining feature for true members of the genus *Merlangius*, which places them firmly within the cod family (Gadidae), is their precise fin arrangement. Specifically, these fish consistently exhibit three distinct and separate dorsal fins situated along their upper back. These are complemented by two separate anal fins positioned underneath the body structure. While the first dorsal fin is often shorter than the following two, the total count of three dorsal fins and two anal fins is the standard anatomical marker used for identification among true whiting species. This specific fin count, when assessed alongside other morphological details, is crucial for distinguishing them from other fish that might share the common name 'whiting' but belong to different biological families.