黑鰭舌鰨分(fen)布在(zai)南達(da)越南北部、北達(da)日本南部等近海以(yi)及兩廣到浙江(jiang)等海區。
黑鰭舌鰨體長為(wei)體高3.4倍,為頭長5.7倍(bei)。頭長為(wei)吻長3.4倍(bei),為眼徑6.9倍,為上頜長4.1倍。
黑鰭舌鰨(ta)體長舌形,甚側(ce)(ce)(ce)扁,背緣(yuan)(yuan)(yuan)和腹(fu)緣(yuan)(yuan)(yuan)圓(yuan)凹(ao),后(hou)(hou)部尖(jian)。頭較(jiao)短(duan)(duan)小(xiao)(xiao),前(qian)(qian)(qian)(qian)部圓(yuan)。吻短(duan)(duan),前(qian)(qian)(qian)(qian)端(duan)(duan)圓(yuan)鈍(dun),鉤狀(zhuang)突(tu)中等長,尖(jian)端(duan)(duan)不伸達上跟(gen)前(qian)(qian)(qian)(qian)緣(yuan)(yuan)(yuan)的下方(fang)(fang)。眼(yan)(yan)小(xiao)(xiao),兩(liang)眼(yan)(yan)均位(wei)(wei)于(yu)(yu)(yu)頭左側(ce)(ce)(ce),相互(hu)靠近,上眼(yan)(yan)前(qian)(qian)(qian)(qian)緣(yuan)(yuan)(yuan)略(lve)前(qian)(qian)(qian)(qian)于(yu)(yu)(yu)下眼(yan)(yan)前(qian)(qian)(qian)(qian)緣(yuan)(yuan)(yuan)。眼(yan)(yan)間(jian)隔(ge)頗窄(zhai),小(xiao)(xiao)于(yu)(yu)(yu)眼(yan)(yan)徑。有(you)眼(yan)(yan)側(ce)(ce)(ce)前(qian)(qian)(qian)(qian)鼻(bi)孔管狀(zhuang),位(wei)(wei)于(yu)(yu)(yu)下眼(yan)(yan)前(qian)(qian)(qian)(qian)方(fang)(fang);后(hou)(hou)鼻(bi)孔圓(yuan)孔狀(zhuang),位(wei)(wei)于(yu)(yu)(yu)下眼(yan)(yan)前(qian)(qian)(qian)(qian)緣(yuan)(yuan)(yuan)上方(fang)(fang)、眼(yan)(yan)間(jian)隔(ge)前(qian)(qian)(qian)(qian)部。無(wu)眼(yan)(yan)側(ce)(ce)(ce)前(qian)(qian)(qian)(qian)鼻(bi)孔退(tui)化,后(hou)(hou)鼻(bi)孔位(wei)(wei)較(jiao)高(gao),邊緣(yuan)(yuan)(yuan)略(lve)隆起。口小(xiao)(xiao),下位(wei)(wei),口裂弧形,口角后(hou)(hou)端(duan)(duan)伸達下跟(gen)中部下方(fang)(fang)。有(you)眼(yan)(yan)側(ce)(ce)(ce)兩(liang)頜(he)無(wu)牙(ya);無(wu)眼(yan)(yan)側(ce)(ce)(ce)兩(liang)頜(he)具絨毛狀(zhuang)細牙(ya),窄(zhai)帶狀(zhuang)排列。唇(chun)緣(yuan)(yuan)(yuan)無(wu)穗狀(zhuang)小(xiao)(xiao)須。鰓孔窄(zhai)長。前(qian)(qian)(qian)(qian)鰓蓋骨邊緣(yuan)(yuan)(yuan)不游離。鰓蓋膜(mo)不與峽部相連。無(wu)鰓耙。肛門(men)偏于(yu)(yu)(yu)無(wu)眼(yan)(yan)側(ce)(ce)(ce),生殖突(tu)起短(duan)(duan),緊連于(yu)(yu)(yu)臀鰭第一鰭條。
黑鰭(qi)舌鰨(ta)有眼側被櫛鱗,無(wu)眼側被弱櫛鱗。徐尾鰭(qi)外(wai),各(ge)鰭(qi)均不被鱗。有眼側具3條(tiao)側(ce)線,側(ce)線完全,上(shang)、中(zhong)側(ce)線和中(zhong)、下側(ce)線間約(yue)各具鱗10行。頭側(ce)眼前和前鰓(sai)蓋(gai)骨(gu)均具側(ce)線;無眼側(ce)無側(ce)線。
黑(hei)鰭(qi)(qi)(qi)舌鰨背鰭(qi)(qi)(qi)起(qi)點在吻部前端上方。臀(tun)鰭(qi)(qi)(qi)起(qi)點在鰓蓋(gai)后緣(yuan)的后下方。背鰭(qi)(qi)(qi)和臀(tun)鰭(qi)(qi)(qi)鰭(qi)(qi)(qi)條均(jun)不分(fen)支,后端均(jun)與尾鰭(qi)(qi)(qi)相連(lian)。無(wu)胸鰭(qi)(qi)(qi),有眼側具(ju)腹鰭(qi)(qi)(qi),位(wei)于(yu)腹部中線,以(yi)膜與臀(tun)鰭(qi)(qi)(qi)相連(lian);無(wu)眼側無(wu)腹鰭(qi)(qi)(qi)。尾鰭(qi)(qi)(qi)后緣(yuan)尖(jian)形。
黑鰭舌鰨棲息于近海大陸(lu)棚(peng)泥沙底質海域。以底棲之(zhi)無脊椎動物,如多毛類(lei)及甲殼(ke)類(lei)等為食。
黑(hei)鰭(qi)舌鰨(ta)為中小型魚類,通常以底拖(tuo)網(wang)捕(bu)獲,一般(ban)以加工制品食(shi)之(zhi),略具經濟價(jia)值。