Callionymus sagitta Pallas, 1770

Islam, Md. Jayedul, Neiogi, Amit Kumer, Nahar, Najmun, Sathi, Jasmin, Lee, Youn-Ho, Kim, Choong-Gon & Habib, Kazi Ahsan, 2020, Two new records of dragonet fish, Callionymus sagitta Pallas, 1770 and Callionymus erythraeus Ninni, 1934 from Bangladesh, Records of the Zoological Survey of India 120 (3), pp. 221-224 : 222-223

Callionymus sagitta Pallas, 1770 ( Figure 2 )

Arrow dragonet

Material examined: F1612sb-184, 1 ex., 61 mm SL, Bangladesh: Bagerhat , Sundarbans, Alorkol (21°42'21.0" N, 89°35'14.4" E), 16.xii.2016, K.A. Habib & A.K. Neogi .

Diagnosis: Body elongate, moderately depressed. Opercle without a free flap of skin. Inter orbital distance less than 1/3 of ED. Upper jaw protractile, posterior end not

Parameters F1612sb-184 F1710SM-03

Standard length (mm) 61.0 72.5

In percent of Standard length

Body depth 11.48 7.69

Head length 40.98 37.18

First dorsal fin base 8.20 7.69

length

Second dorsal fin base 39.34 30.77

length

Anal fin base length 38.69 28.21 Pectoral fin base length 8.20 24.36 Longest dorsal fin spine 9.84 28.21

length

Longest dorsal fin ray 14.75 14.10

length

Pectoral fin length 26.77 24.36

Anal fin length 13.11

Caudal fin length 22.95 30.77 Caudal peduncle length 13.11 20.51

In percent of Head length

Eye diameter 33.84 27.59

Snout length 24.16 20.69

reaching anterior edge of eye. Preopercular spine with a slightly up curved main tip and 5 slightly recurved dorsal tips (additionally to main tip) at its dorsal margin; opercle and subopercle spineless, first spine of first dorsal fin not filamentous. Consisting flexible spines, first ray of 2nd dorsal fin larger than first spine of 1st dorsal fin (first dorsal ray 1.4 in first dorsal fin spine). First dorsal fin with IV spines; 2nd dorsal fin with 9 rays (last dorsal ray divided at its base); pectoral soft ray 16; pelvic soft ray 5; anal soft ray 8 (last anal ray branched in base). Caudal fin rays mostly branched, distally convex and not elongated, lateral line simple. Head and body sand yellow, covered with numerous small white spots. First dorsal fin plain black ventral side is whitish. Morphomeristic measurements are given in Table 1.

8 (last anal ray branched in its base), lateral line simple. First dorsal fin black; 2nd dorsal fin whitish with black bar; anal fin black with white base; caudal fin whitish with 3 black band. Caudal fin rounded, not elongated. Six black blotch present on side of the body. A dark brown spot present on upper part of the caudal fin base. Morphomeristic measurements are given in Table 1.

Distribution: Callionymus erythraeus was previously known from Western Indian Ocean: Red Sea, Persian Gulf, and southern India (Gulf of Mannar) ( Fricke, 2001, 2002; Froese & Pauly, 2019).

Distribution: Callionymus sagitta is known to occurs from indo-West Pacific: Arabian Peninsula to the Philippines, Sri Lanka, India, Singapore, Malaysia, Gulf of Thailand, South China Sea and East China Sea, Korea, Vietnam and Indonesia ( Fricke, 2002; Froese & Pauly, 2019).

Figures

Figure 2. Callionymus sagitta (F1612sb-184) from Sundarbans coast, Bangladesh.