. California fish and game . eidcp) page 128. THE MACKERELS. (Family Scombridee.) In this family are the mackerel, bonito, skipjack, albacore, and Span-ish mackerel. All but the mackerel (Scomber) have a keel-like projec-tion on the side of the tail with sometimes a pair of small lacks the keel in the middle of the side but has a pair of smallones on each side. Most of the mackerels have very small scales. Insome of them these are enlarged and crowded together at the front ofthe body in a corslet. In all of them the dorsal and anal fins are fol-lowed by detached finlets. The cauda
. California fish and game . eidcp) page 128. THE MACKERELS. (Family Scombridee.) In this family are the mackerel, bonito, skipjack, albacore, and Span-ish mackerel. All but the mackerel (Scomber) have a keel-like projec-tion on the side of the tail with sometimes a pair of small lacks the keel in the middle of the side but has a pair of smallones on each side. Most of the mackerels have very small scales. Insome of them these are enlarged and crowded together at the front ofthe body in a corslet. In all of them the dorsal and anal fins are fol-lowed by detached finlets. The caudal is widely forked and the tailexceedingly slender. The color is usually metallic steel-blue and brightsilvery. The Mackerel (Scomber japonicus). The mackerel has a high, triangular first dorsal fin with 9 or 10spines. It is separated by a considerable space from the second dorsal,which is much lower. The anal is similar to the second and is atrifle behind it. Both dorsal and anal fins are followed by 5 or 6 Fig. 63. The mackerel {Scomber japonicus). The pectoral fin is rather short, or about as long as the distance fromthe eye to the gill opening. On each side of the tail are a pair of keel-like projections. The color most readily distinguishes the mackerelfrom its relatives. It is blue above and silvery below, with manycrooked, blackish bars extending downward from the back to the middle 120 C!ALIPOKNIA FISH AND (iAMK. of the side. The k)\vei- piirl of the side is usually more or less mottledwith dusky blotches. In California, though we eall this tish the mackerel, without differen-tiating it from the true mackerel of the Atlantic, we must rememberthat it is a very different fish. It differs particularly in having an airbladder which is entirely lacking in the true nuickerel. Its dark barsare not so clearly cut. and it has a larger eye. The true mackerel hasno dusky mottled spots on the lower part of the side, and there areseveral other differences. This mac
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