Blenniella interrupta (Bleeker 1857)

Occurs solitary or in groups on near shore rocky areas, rocky intertidal flats, and tide pools, 0-2 m deep, usually less than 1 m (Ref. 90102, 9962).

Dorsal spines (total): 12 - 14; Dorsal soft rays (total): 18 - 21; Analspines: 2; Analsoft rays: 19 - 22; Vertebrae: 37 - 40

Distinct pairing (Ref. 205).

Dorsal fin XII-XIV, 18-21, notched between spinous and segmented-ray portions; anal fin II, 19-22; pectoral rays 12-15; pelvic fin I, 3. Vertebrae 11-12 + 26-28. Orbital cirrus simple filamentous; nasal cirri short and simple to palmate with 2-6 branches; nape with cirri. Lateral line, continuous anterodorsally below dorsal spines from 4th to 10th, disconnected posteroventrally up to below dorsal spine 7-8th to 12-13th. Mandibular pores 4-6 Lips margin entire. Occipital crest present only in males, and only 0.7 mm or lower. Meristic characters slightly vary geographically, increasing from north to south (Ref. 9962). Body depth at anal-fin origin 5.3-6.0 in SL. Male grey to dark brown with longitudinal rows of blue dashes. Female pale grey with dark horizontal dashes and vertical dark A/H-shaped bars; dorsal and caudal fins spotted (Ref. 90102).

Found solitary or groups (Ref. 90102) near-shore rocky areas, including tide pools and at depths usually less than 1 meter (Ref. 9962). Oviparous. Eggs are demersal and adhesive (Ref. 205), and are attached to the substrate via a filamentous, adhesive pad or pedestal (Ref. 94114). Larvae are planktonic, often found in shallow, coastal waters (Ref. 94114).

Blenniella interrupta (Bleeker)

Salarias interruptus Bleeker, 1857b:68 [Boero, Kajeli; holotype, RMNH 4787].

DESCRIPTION.—Dorsal fin (Table 9). XII to XIV, 18 to 21 = 31 to 35 (XIII in 93% and XIV in 6% of 344 specimens examined for character; rarely 18 segmented rays, rarely 31 or 35 total elements); mean numbers of total elements usually higher for males from any locality than for females from same locality (statistically significantly higher for 8 of 12 localities where means for both sexes are available); membrane between spinous and segmented-ray portions notched 60% to more than 75% length first segmented ray (usually more than 75% length); membrane from posteriormost ray attaching to point ranging from slightly in advance of caudal-fin base to on dorsal edge of caudal fin (out on fin up to 12% fin length in males, scarcely on fin in females; usually attached at or anterior to origin of caudal-fin base in both sexes).

Anal fin (Table 9). II, 19 to 22 (19 in only 2 of 333 specimens examined for character); mean numbers of segmented elements higher for males than for females for all 12 localities where means for both sexes are available (statistically significantly higher for 5 localities); posteriormost element usually not split to base (95% of 323 specimens examined for character); fin usually not bound by membrane to caudal peduncle (99% of 212 specimens examined for character). Skin covering anal-fin spines and distal half of segmented rays of large or mature males occasionally thickened or inflated, rarely weakly crinkled along edges.

Pectoral-fin rays 12 to 15 (14 bilaterally in 88% of 197 specimens examined for character; 12 only unilaterally, in 2 specimens, both 14 unilaterally; unilaterally or bilaterally 14 in all but 2 specimens).

Pelvic-fin rays I,3.

Caudal fin. Dorsal procurrent rays 6 to 8 (6 or 7 in 98% of 266 specimens examined for character), ventral procurrent rays 5 to 8 (6 or 7 in 97% of specimens examined for character), total procurrent rays 11 to 16 (, , or in 92% of specimens); segmented rays 13 in all 256 specimens examined for character.

Vertebrae (Table 9). 11 or 12+26 to 29 = 37 to 40 (11 precaudal vertebrae in 97% of 288 specimens examined for character; 40 total vertebrae in only 3 specimens, all males, of 312 examined for character), mean numbers of total (and caudal) vertebrae for males higher at 11 of 12 localities where means for both sexes are available (statistically significantly higher for 2 of the 11 localities, means identical for 1 locality); posteriormost pleural rib on 11th to 13th from anteriormost centrum (on 12th in 96% of 268 specimens examined for character); posteriormost epineural on 20th to 29th from anteriormost centrum (on 24th to 28th in 98% of 209 specimens examined for character).

Cirri. Nape cirrus absent bilaterally in 92.7% of 383 specimens examined for character, present unilaterally in 5.5%, and bilaterally in 1.8% of specimens (cirri, when present, usually reduced, often to barely noticeable nubbin); considerable local variation exists in percentage of specimens with cirri: in single collection of 17 specimens from Dumaguete, Negros, Philippines, 5 (29.4%) have nape cirrus unilaterally and 2 (11.8%) have cirri bilaterally; single collection of 59 specimens from Maloh, Negros, about 50 km down coast from Dumaguete, includes only two specimens with nape cirri (3.4%), both unilaterally; single collection of 25 specimens from nearby Siquijor Island includes only 1 specimen (4.0%) with nape cirri, bilaterally. Orbital cirrus a simple filament (3 specimens with cirrus on one side with short branch, fourth specimen with cirrus on 1 side with 3 short branches), always shorter than orbital diameter in females, rarely equaling or slightly exceeding orbital diameter in males. Nasal cirri short, simple to palmate, with 2 to 6 branches (rarely 6, rarely simple in specimens over 25 mm SL).

Table 9.—Frequency distributions for certain meristic characters in male and female specimens of Blenniella leopardus and B. interrupta from various localities. Underlining of means indicates significant differences between means of sexes from same locality (p ≤ .05).

Lateral line. Continuous canal anterodorsally with simple pores (1 specimen of 173 examined for character with single vertical pair of pores near origin of lateral line), extending posteriorly to point between verticals from bases of 4th and 10th dorsal-fin spines (extending posterior to base of 7th spine in 93% of specimens examined; terminating before base of 6th spine in only 1 specimen), then continuing posteroventrally and posteriorly as series of 0 to 5 short, disconnected, horizontally bi-pored canals (tubes) in skin (only 1 specimen lacked tubes); posteriormost tube in area between vertical from between bases of 7th and 8th spines and vertical from between bases of 12th and 13th spines (posterior to vertical from base of 9th spine in 92% of specimens examined).

Mandibular pores 4 to 6 (6 bilaterally in 87% of 181 specimens examined for character, and at least unilaterally in all but 2 specimens).

Five to 7 sensory pore positions between 1 and 5 o'clock on postorbital margin (6 in 93% of 173 specimens examined for character), 0 to 3 positions occupied by pairs of pores (2 positions in 89% of specimens examined; no pairs in only 3 specimens).

Posterior canines present in all specimens >25.0 mm SL, variably present in specimens as small as 20.0 mm SL.

Margins of both lips entire.

Crest. Females lack any indication of crest. Males up to 58 mm SL exhibit little or no indication of crest, but most males >34 mm SL with distinct, low, rounded, longitudinal ridge on top of the head; crests most highly developed in males >50 mm SL; highest crests only 0.7 mm high (2 males 60 and 62 mm SL).

Color pattern (in preservative). Highly variable. Males (Figures 10a, 11a). Head: variably dusky with prominent small, dark spot (sometimes appearing silvery white) just posterior and ventral to mid-level of orbit; rarely, small, indistinct spot just dorsal to previous spot; another small, dark spot often present just dorsoposterior to pore at about 1 o'clock on postorbital margin; large, prominent dark spot always present dorsoanteriorly on opercle, encroaching on preopercular margin; small, dark spot often present just dorsal to opercular spot; short, irregular bar, slightly paler than dusky surrounding area, extending ventrally from orbit across corner of upper lip, occasionally narrowing and extending across ventral surface of head just posterior to edge of lower lip, continuous with similar marking from opposite side of head, sometimes followed posteriorly on ventral head surface by broad, dusky band and another pale area. Body: side irregularly dusky below spinous portion of dorsal fin, with up to 3 dusky bands, posteriormost darkest, sometimes forked ventrally, occasionally incorporating tiny, pale or dark ocellus in portion below body midline; row of up to 5 small-to-large, often diffuse, dark bars or blotches on midside below segmented-ray portion of dorsal fin, posteriormost 1 or 2 blotches often absent, indications of another blotch occasionally present on caudal peduncle; dorsal and/or ventral ends of some or all blotches, except those on peduncle, with dark-margined, white spot (ocellus); dorsal ocelli usually fewer in number than ventral ocelli; dorsal ocellus of each pair less elongate than ventral ocellus, depth ≤ that of pupil, none especially prominent; ventral ocelli usually very slender, up to 4 times as long as deep, usually more prominent than dorsal ocelli. Dorsal fin: spinous portion varying from overall dusky to basally dark dusky becoming less dark distally with diffuse, dusky spots; segmented-ray portion somewhat similar to spinous portion but usually with more spots and few, dark pinstripe-like marks radiating dorsoposteriorly across basal half of fin. Anal fin dusky, slightly darker distally. Caudal fin with dusky interradial membranes often interrupted by rows of small, diffuse, pale spots; dorsoposterior portion of fin generally paler or unmarked; dusky bands variably present on caudal fin of males <25 mm SL. Pectoral and pelvic fins unmarked.

Features of fresh color, based on slide of 47 mm SL specimen from Savo, Solomon Islands (head and body mostly faded). Iris with rusty-brown patches; fleshy ridge on top of head rusty brown anteriorly and dorsally; slender, rusty-brown bar extending dorsoposteriorly from dark postorbital spot across fleshy ridge on top of head, another, similar bar extending dorsally from anterior margin of dark opercle spot almost to fleshy ridge; tips of dorsal-fin spines and 3 anteriormost segmented rays bright white, margins of interradial membranes rusty brown; anteriorly, subdistal half of each interradial membrane of segmented-ray portion with 3 dusky-margined, rusty-brown blotches separated by wavy, pale pinstripes, blotches becoming olive brown posteriorly; 4 or 5 brown pinstripes on basal half of segmented-ray portion; anal fin interradial membranes bright white distally; caudal fin pale distally, darker brown proximally with rows of up to 7 or 8 fine, white spots; caudal peduncle covered with fine, white spots.

Females (Figures 10c, 11b,c). Head: variably pale and dusky, markings paler than those of males; small, dusky spot often present just posterior and ventral to mid-level of orbit; broad, dusky band extending across ventral surface from corners of mouth; band may be interrupted mid-ventrally by pale area, separated from dark lower lip by pale area; another dusky band extending ventrally from mid-ventral margin of orbit across upper lip. Body: up to 6 slightly irregular rows of dark spots and dashes covering posterior half to two-thirds of body, occasionally up to 6 faintly dusky H-shaped bands incorporating dark spots and dashes. Dorsal fin: pale with dark spots on spines and rays or adjacent to rays; spots arranged in more or less curved rows. Anal fin with 1 or 2 rows of faintly to darkly dusky spots, interradial membranes dusky distally, tips of rays pale. Caudal fin with up to about 7 columns of dark spots mostly restricted to rays. Pectoral and pelvic fins essentially immaculate.

Bath and Patzner (1991, fig. 16) reproduce a useful black-and-white photograph of a male specimen from Bali. The only published illustrations of fresh coloration of B. interrupta are those of Shen et al. (1986, figs. 43a, female, and 43b, male), from which the following description is taken: female coloration little different from that of female in our Figure 10b. Male mostly dark brown interspersed with paler brown areas; dark opercular spot with slight bluish cast; pale slashes of body ocelli also bluish; numerous fine, whitish spots posteriorly on body (rarely evident in long-preserved specimens).

Bleeker (1983, pl. 444: fig. 11, as Salarias interrupta, and pl. 44: fig. 2, as Salarias hendriksi, a synonym of Blenniella bilitonensis) illustrated, in color, 2 females of B. interrupta. Neither offers much information over that of Shen et al. The first Bleeker figure shows a slight yellowish cast to the fins and iris, and the second, a reddish brown cast to the same features.

Size. Largest male and female specimens about 60 mm and 51 mm SL, respectively; few males exceed 55 mm SL, few females, 45 mm SL. Smallest specimen identifiable as male, 17.5 mm SL (BPBM 5713), exhibits opercle spot and beginning formation of ocelli on body. Smallest specimen identifiable as female, 20.0 mm SL, exhibits female color pattern, urogenital papilla; specimens <19 mm SL usually not assignable with certainty to sex based on urogenital papilla or color pattern. Specimen, 12.5 mm SL, taken with large sample of juvenile interrupta, 15.6 mm and larger (BPBM 5713), has color pattern unlike that of any larger specimen: 5 pairs of slender bands on body, 10 saddles along dorsal body contour; based on size series of specimens taken with it, 12.5 mm specimen is probably B. interrupta; none of these small specimens have ophioblennius-stage dentition.

GEOGRAPHIC VARIATION.—There appears to be a slight trend for means of meristics (Table 9) to increase as one progresses from the northern end of the range south and east to the southern end of the range of the species.

ECOLOGY.—Habitat data indicate that B. interrupta is an inhabitant of near-shore rocky areas, including tide pools and at depths usually under 1 m.

COMPARISONS AND INTERRELATIONSHIPS.—Blenniella interrupta is the sister species to B. leopardus (see Phylogenetic Analysis section), from which it differs primarily in lacking nape cirri and males not having one of the dorsal body ocelli enlarged and melanistic; female interrupta often have several dark slashes on body, probably formed by fusions of spots, whereas slashes are essentially absent in leopardus females (see also Table 5 for comparisons of males with those of similar species).

DISTRIBUTION (Figure 63).—Bali and Flores, Indonesia, north to Taiwan, east to New Britain, and south to Efate, New Hebrides; absent from nonmarginal Pacific plate.

NOMENCLATURAL

分布於西太平洋區，由台灣、印尼至萬那杜等。台灣分布於南部、東部及小琉球等海域。

小型魚類，僅具學術研究價值。

體延長，稍側扁，似圓柱狀；頭鈍短。成熟雄魚頭頂具低冠膜，雌魚無。鼻鬚分支；眼上鬚單一不分支；無頸鬚。上下唇平滑，齒骨具一犬齒。D. XIII-XIV(XIV), 19-20； A. II, 20-21； P. 13-14(14)； V. I, 3。背鰭具缺刻且與尾柄相連，臀鰭不與尾柄相連。雄魚眼後、鰓蓋上緣各有一暗斑或暗紋，體側有9條不明顯淡橫帶，橫帶間上下皆有一環紋，並連成似一縱線，而橫帶中央上下皆有一極淡藍斑點；尾柄、尾鰭基部有許多白點，胸鰭灰白，其餘鰭灰黑色；背鰭棘部有斑紋，軟條部有4-5條黑線，活魚時為藍綠色。雌魚眼後有一灰黑紋，體側有6-8列不連續的縱點或線紋，橫帶不明顯，無環紋；背鰭和尾鰭亦有幾列黑點；臀鰭基部有一列黑點，鰭緣黑色。

主要棲息於沿岸潮間帶礁石潮池區，深度通常不及1公尺，受驚嚇時可見其用一前一後的方式跳躍於潮池與空氣間。以藻類、碎屑和小型無脊椎動物為食。

Blenniella interrupta és una espècie de peix de la família dels blènnids i de l'ordre dels perciformes.

Blenniella interrupta, the dashed-line blenny, is a species of combtooth blenny found in coral reefs in the western Pacific ocean.

Blenniella interrupta es una especie de pez de la familia Blenniidae en el orden de los Perciformes.

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Blenniella interrupta Blenniella generoko animalia da. Arrainen barruko Actinopterygii klasean sailkatzen da, Blenniidae familian.

斷紋真蛙鳚（学名：Blenniella interrupta），又名斷紋真動齒鳚、狗鰷，为鳚科真動齒鳚屬下的一个种。