Body covered with small or moderate sized ctenoid scales
, those of cheeks and opercles in 2-3 rows all cycloid except for occasional ctenoid scale
posteriorly; lateral line scales simple.
Among the wide variety of ossicles we describe herein a new subtype of ctenoid scales
, overgrowing ctenoid scales
, and two kinds of tubercles--overgrowing ctenoid tubercles and circuloid tubercles.
Bryaninops earlei differs from all congeners in having large ctenoid scales
(22-25 in longitudinal series); it is similar to B.
Distichodus mossambicus is a distinctive fish, with a deep, compressed body covered with ctenoid scales
that also cover the adipose fin.
monoculus, characterized by having ctenoid scales
Burdak (1979) discussed the dynamics of cycloid and ctenoid scales
in squamations of the leaping mullet Liza (= Mugit) saliens (Risso).
Larvae of northern sculpin have 35-36 myomeres, pelvic fins with one spine and two rays, a bony preopercular shelf, four preopercular spines, 3-14 irregular postanal ventral melanophores, few, if any, melanophores ventrally on the gut, and in larger specimens, two rows of ctenoid scales
directly beneath the dorsal fins extending onto the caudal peduncle.
Scale development begins at 9.80 mm SL in the mid-region of the flanks of the body, increasing peripherally until the body is entirely covered by ctenoid scales
at 14.00 mm SL.
Diagnosis: Minute stout-bodied eleotrids with large ctenoid scales
confined to posterior three-quarters of body (commencing after end of first dorsal fin but before origin of second dorsal fin), and no cycloid scales; head and body anterior to origin of second dorsal fin scaleless.
The introduction of scanning electron microscopy allowed its use for detailed study of fish scales, such as that by Roberts (1993) on ctenoid scales
of Teleostei, revealing their microstructure and variety.
In tetras, important characters such as ctenoid scales
, incomplete lateral line, naked predorsal line etc.