黑鰭舌鰨分布在(zai)南(nan)達越南(nan)北部(bu)、北達日(ri)本南(nan)部(bu)等近海以(yi)及兩廣(guang)到浙江等海區。
黑鰭舌鰨體(ti)(ti)長為體(ti)(ti)高3.4倍,為頭長(chang)5.7倍。頭長(chang)為吻長(chang)3.4倍,為眼徑6.9倍(bei),為(wei)上頜長4.1倍。
黑鰭舌鰨體長(chang)舌形(xing),甚側(ce)(ce)扁,背緣(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)和腹緣(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)圓凹,后(hou)部(bu)尖(jian)。頭較短小,前(qian)部(bu)圓。吻(wen)短,前(qian)端(duan)(duan)圓鈍,鉤狀(zhuang)(zhuang)突(tu)(tu)中(zhong)等長(chang),尖(jian)端(duan)(duan)不伸達上跟(gen)前(qian)緣(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)的下(xia)方(fang)。眼(yan)(yan)(yan)小,兩(liang)(liang)眼(yan)(yan)(yan)均位于(yu)頭左側(ce)(ce),相(xiang)(xiang)互靠近,上眼(yan)(yan)(yan)前(qian)緣(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)略前(qian)于(yu)下(xia)眼(yan)(yan)(yan)前(qian)緣(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)。眼(yan)(yan)(yan)間隔頗窄,小于(yu)眼(yan)(yan)(yan)徑。有眼(yan)(yan)(yan)側(ce)(ce)前(qian)鼻(bi)孔(kong)(kong)管狀(zhuang)(zhuang),位于(yu)下(xia)眼(yan)(yan)(yan)前(qian)方(fang);后(hou)鼻(bi)孔(kong)(kong)圓孔(kong)(kong)狀(zhuang)(zhuang),位于(yu)下(xia)眼(yan)(yan)(yan)前(qian)緣(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)上方(fang)、眼(yan)(yan)(yan)間隔前(qian)部(bu)。無眼(yan)(yan)(yan)側(ce)(ce)前(qian)鼻(bi)孔(kong)(kong)退化(hua),后(hou)鼻(bi)孔(kong)(kong)位較高,邊緣(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)略隆起(qi)。口小,下(xia)位,口裂弧形(xing),口角后(hou)端(duan)(duan)伸達下(xia)跟(gen)中(zhong)部(bu)下(xia)方(fang)。有眼(yan)(yan)(yan)側(ce)(ce)兩(liang)(liang)頜(he)(he)無牙(ya);無眼(yan)(yan)(yan)側(ce)(ce)兩(liang)(liang)頜(he)(he)具絨毛狀(zhuang)(zhuang)細(xi)牙(ya),窄帶狀(zhuang)(zhuang)排列(lie)。唇緣(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)無穗狀(zhuang)(zhuang)小須。鰓孔(kong)(kong)窄長(chang)。前(qian)鰓蓋骨邊緣(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)不游(you)離。鰓蓋膜(mo)不與峽部(bu)相(xiang)(xiang)連(lian)。無鰓耙(pa)。肛門偏(pian)于(yu)無眼(yan)(yan)(yan)側(ce)(ce),生殖(zhi)突(tu)(tu)起(qi)短,緊(jin)連(lian)于(yu)臀鰭第一鰭條。
黑鰭舌鰨有(you)眼(yan)側被櫛鱗(lin),無眼(yan)側被弱櫛鱗(lin)。徐(xu)尾鰭外(wai),各鰭均不(bu)被鱗(lin)。有(you)眼(yan)側具3條側(ce)線,側(ce)線完(wan)全,上、中側(ce)線和中、下側(ce)線間約各(ge)具鱗(lin)10行(xing)。頭側(ce)眼前(qian)和前(qian)鰓蓋骨均具側(ce)線(xian);無(wu)眼側(ce)無(wu)側(ce)線(xian)。
黑鰭(qi)舌鰨(ta)背(bei)鰭(qi)起點(dian)在吻部前端上(shang)方。臀鰭(qi)起點(dian)在鰓蓋(gai)后緣的后下方。背(bei)鰭(qi)和臀鰭(qi)鰭(qi)條均不分支,后端均與(yu)尾鰭(qi)相連(lian)。無(wu)胸鰭(qi),有(you)眼側具腹鰭(qi),位于腹部中(zhong)線,以膜(mo)與(yu)臀鰭(qi)相連(lian);無(wu)眼側無(wu)腹鰭(qi)。尾鰭(qi)后緣尖形(xing)。
黑(hei)鰭舌鰨(ta)棲息于近海(hai)大陸棚泥沙底(di)質(zhi)海(hai)域。以底(di)棲之無脊椎動(dong)物,如多毛類(lei)及甲殼類(lei)等為食(shi)。
黑鰭舌鰨為中小型魚類,通(tong)常以(yi)底拖網捕獲,一般以(yi)加工制品(pin)食(shi)之,略具經濟價值。