Soft dorsal

(Zool.) the posterior part of the dorsal fin of fishes when supported by soft rays.

See also: Soft

References in periodicals archive ?
The sides and both hard and soft dorsal fins can lighten significantly when they become agitated (Fig.
25) in head length; interspinous membranes of dorsal fin extending above spine tips in males supported by a slender rod originating from behind each spine; first or second soft dorsal ray longest 1.
2c); no scales on preopercular flange, its posterior margin weakly serrated; low scaly sheath on soft dorsal and anal-fin ray bases; dorsal-fin spines strong, fourth and fifth longest; first anal-fin spine visibly shorter than orbit diameter; second anal-fin spine clearly longer than longest (fourth) dorsal-fin spine; third anal-fin spineshorter than second anal-fin spine; pectoral-fin long, its length subequal or slightly greater than head length, tip nearly reaching to anal opening (in some paratypes up to anal-fin spine base); pelvic-fin spine longer than snout length; first ray of pelvic-fin intruded and clearly longer than second anal-fin spine; caudal-fin forked, the upper lobe is slightly longer and relatively more pointed.
2010) who concluded that length of dorsal fin base, depth of caudal peduncle and head length and the first anal spine length and length of soft dorsal ray for T.
We've had equal success with bluegills hooked through the bottom lip and out a nostril and baits hooked just behind the soft dorsal fin.
We identified juvenile and adult Iowa darters using presence of a frenum, two anal-fin spines, an incomplete lateral line (usually extending posterior to between the origin of the soft dorsal and the midpoint of soft-dorsal base), dark saddles or other pigment on the lateral surface, and a terminal mouth and snout.
3a Body orange; [greater than or equal to] 15 soft dorsal rays; juveniles with blue spots on body: Hypsypops rubicundus
6 % of SL, calculated from photographs), taller first dorsal fin, and longer soft dorsal and anal rays.
In most specimens, many small spots are scattered across the spinous dorsal fin, often continuing onto the soft dorsal fin; in some individuals, only two or three spots are present on the spinous dorsal fin.
Caudal-peduncle grooves (or shallow notch) present dorsally and ventrally; base of soft dorsal and anal fins unequal in length with anal-fin base shorter (only about 45-70%) than dorsal-fin base length 13
Although the last-mentioned four species all possess a dark opercular marking, they differ noticeably from V lepidobucca in lacking scales on the head, and counts of soft dorsal and anal rays (respective counts of 14 and 15, 12 and 12,11 and 11, and 12 and 11 for V auronotata, V opercularis, V papilio, and V hiramatsui).