A Guide to the Study of Fishes, Volume 2 (of 2)Jordan, David Starr
History
A Guide to the Study of Fishes, Volume 2 (of 2)
Jordan, David Starr
Fishes; Fishes -- Bibliography; Zoology -- History
In the north Pacific _Sebastes_ gives place to _Sebastolobus_, with
three species (_macrochir_, _altivelis_, and _alascanus_), all
bright-red fishes of soft substance and living in rather deep water.
_Sebastolobus_ is characterized by its two-lobed pectoral fin, the lower
rays being enlarged.
The genus _Sebastodes_, with its rougher-headed ally _Sebastichthys_,
with 13 dorsal spines and the vertebræ 27, ranges farther south than
_Sebastes_ and forms one of the most characteristic features of the
fauna of California and Japan, 50 species occurring about California and
25 being already known from Japan. One species (_Sebastichthys
capensis_) is recorded from the Cape of Good Hope, and two,
_Sebastichthys oculatus_ and _S. darwini_, from the coast of Chile.
Within the limits of _Sebastodes_ and _Sebastichthys_ is a very large
range of form and color, far more than should exist within the range of
a natural genus. On the other hand, all attempts at generic subdivision
have failed because the species form a number of almost perfectly
continuous series. At one extreme are species with large mouths, small
scales, relatively smooth cranium, and long gill-rakers. At the other
extreme are robust species, with the head very rough, the mouth
moderate, the scales larger, and the gill-rakers short and thick. Still
other species have slender cranial spines and spots of bright pink in
certain specialized localities. These approach the genus _Helicolenus_
as other species approach _Scorpæna_.
[Illustration:
FIG. 368.—Priest-fish, _Sebastodes mystinus_ Jordan & Gilbert.
Monterey, Cal.
]
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