Black Spinecheek Gudgeon

Body dark brown to black with longitudinal lines; fins spotted in young, black in large individuals (Ref. 5493).

Aontheca Infestation. Parasitic infestations (protozoa, worms, etc.)

Amphidromous. Refers to fishes that regularly migrate between freshwater and the sea (in both directions), but not for the purpose of breeding, as in anadromous and catadromous species. Sub-division of diadromous. Migrations should be cyclical and predictable and cover more than 100 km.Characteristic elements in amphidromy are: reproduction in fresh water, passage to sea by newly hatched larvae, a period of feeding and growing at sea usually a few months long, return to fresh water of well-grown juveniles, a further period of feeding and growing in fresh water, followed by reproduction there (Ref. 82692).

Dorsal spines (total): 7; Dorsal soft rays (total): 8; Analspines: 1; Analsoft rays: 8

Inhabits brackish estuaries and freshwater streams (Ref. 2847). Found in submerged bank vegetation of freshwater streams (Ref. 41184), marshes and rice fields (Ref. 54520). Found in medium to large-sized rivers of the lower Mekong (Ref. 12975).

Adults inhabit brackish estuaries and medium to large-sized rivers (Ref. 2847, 12975, 48637, 44894); also in submerged bank vegetation of freshwater streams (Ref. 41184), marshes and rice fields (Ref. 54520). Usually found on mud bottoms (Ref. 44894).

fisheries: minor commercial; price category: unknown; price reliability:

分布於印度-太平洋區海域，由東非到社會群島、萬那杜，北至日本。臺灣各地均產。

中小型魚類，可供食用。

第1背鰭：Ⅵ；第2背鰭：Ⅰ/ 8~9。臀鰭：Ⅰ/ 8~9；胸鰭：16~18；腹鰭：Ⅰ/ 5；尾鰭：3+19+2。縱列鱗 42~52；橫列鱗 12~18；背鰭前鱗 34~43。鰓耙 2~3+8~9。總脊椎骨數 25。體長為體高的3.7~5.0倍；為頭長的3.3~3.9倍。頭長為吻長的4.6~5.9倍；為眼徑的5.9~7.8倍；眼間距的3.3~4.0倍。尾柄長為尾柄高的1.7~2.0倍。體延長，身體前部呈圓筒形，後側扁。背緣、腹緣微微隆起，尾柄較長。頭中大，鈍，略平扁；頭後稍高而側扁，其頭寬大於頭高。吻短且鈍，平扁，吻長約為眼徑1.2~1.7倍。眼中大，居上位，稍突出。兩眼間隔寬平，約為眼徑的1.4~2.4倍。眼下方臉頰部具有5條橫向感覺乳突線(L1~L5)，而L2、L3與L4感覺乳突線向下延伸，穿過臉頰中央L8的縱行感覺乳突線。鼻孔每側兩個，分離：前鼻孔圓形，具有短管，接近上唇；後鼻孔小，無鼻管，在眼的前方。口大，前上位，口裂向後延伸至對應於眼睛中位。上、下頜齒形狀細尖，多行，內列齒較大；鋤骨無齒。唇厚。舌大，游離，舌的前端呈平截形。鰓孔寬大，向前向下延伸至鰓蓋骨的下方。前鰓蓋骨後緣中部有1彎曲向前下方的小棘。鰓被架6條。魚體具櫛鱗，頭部、頸部、胸鰭基部與腹部被有圓鱗。吻部和下顎面無鱗片。無側線。背鰭2個：第1背鰭起於胸鰭基部後上方，第3、4棘最長，後端不會延伸至第2背鰭起點；第2背鰭較長，平放時不延伸至尾鰭基部。臀鰭起點與第2背鰭相對。胸鰭寬圓、呈扇形，中側位。腹鰭小，起點於胸鰭基部的下方，內側鰭條長於外側的鰭條，左、右腹鰭靠近，但不相連、癒合，腹鰭末端遠離肛門。尾鰭長圓形。頭部及體側為紅褐色至黑褐色，腹側淺色；頭部自吻經眼睛至鰓蓋上方及臉頰自眼睛後至前鰓蓋骨各有1黑色線紋，時有時無。在胸鰭基部的上方常具1個黑色斑塊；腹鰭淡色；背鰭、臀鰭、尾鰭為灰褐色，鰭上有多條由黑色斑點排列組成的條紋。(林上智、林沛立編寫 2012/10)

暖水性淡水中小型底棲魚類，喜歡棲息在河口或偶入河川的下游水域，以及有泥沙、雜草和碎石相混雜的淺水區。游泳力較弱。屬於肉食性，成魚會攝食小魚、小蝦、蠕蟲等。夜行性，白天多隱藏於石塊、落葉等雜物中。生長快，為塘鱧中較大型的種類。

Eleotris melanosoma, the broadhead sleeper or dusky sleeper, is a species of fish in the family Eleotridae native to marine, fresh, and brackish waters from coastal eastern Africa through southern Asia to the islands of the western Pacific Ocean. This species can reach a length of 26 cm (10 in). It is of minor importance to local commercial fisheries. This species has been introduced to the Panama Canal Zone.