外形特征

灰(hui)藍扁尾海蛇雄性長度87.5厘米，雌性長度142厘米。

灰藍扁(bian)(bian)尾(wei)海蛇背部(bu)多以藍色(se)及灰色(se)為(wei)主(zhu)(zhu)，腹(fu)部(bu)則(ze)以黃(huang)色(se)為(wei)主(zhu)(zhu)，身(shen)(shen)(shen)上滿布黑(hei)色(se)的(de)(de)橫(heng)向條紋。唇(chun)部(bu)呈黃(huang)色(se)，頭部(bu)則(ze)主(zhu)(zhu)要為(wei)黑(hei)色(se)。灰藍扁(bian)(bian)尾(wei)海蛇的(de)(de)腹(fu)部(bu)扁(bian)(bian)平寬大，鼻端及吻(wen)部(bu)同樣扁(bian)(bian)平，吻(wen)鱗(lin)(lin)(lin)(lin)為(wei)單片(pian)(pian)(pian)(pian)(pian)(pian)(pian)大鱗(lin)(lin)(lin)(lin)；身(shen)(shen)(shen)上有(you)(you)(you)21至(zhi)(zhi)25排(pai)不規則(ze)分布的(de)(de)鱗(lin)(lin)(lin)(lin)片(pian)(pian)(pian)(pian)(pian)(pian)(pian)。其身(shen)(shen)(shen)體(ti)主(zhu)(zhu)要呈稍(shao)微被(bei)壓扁(bian)(bian)的(de)(de)近管狀的(de)(de)形狀，吻(wen)部(bu)高(gao)翹，前額有(you)(you)(you)一片(pian)(pian)(pian)(pian)(pian)(pian)(pian)大鱗(lin)(lin)(lin)(lin)片(pian)(pian)(pian)(pian)(pian)(pian)(pian)（亦有(you)(you)(you)部(bu)分蛇類可能沒(mei)有(you)(you)(you)這塊(kuai)鱗(lin)(lin)(lin)(lin)片(pian)(pian)(pian)(pian)(pian)(pian)(pian)）。有(you)(you)(you)一片(pian)(pian)(pian)(pian)(pian)(pian)(pian)眶前鱗(lin)(lin)(lin)(lin)及兩片(pian)(pian)(pian)(pian)(pian)(pian)(pian)眶后(hou)鱗(lin)(lin)(lin)(lin)，7至(zhi)(zhi)8片(pian)(pian)(pian)(pian)(pian)(pian)(pian)上唇(chun)鱗(lin)(lin)(lin)(lin)，第三(san)至(zhi)(zhi)四片(pian)(pian)(pian)(pian)(pian)(pian)(pian)上唇(chun)鱗(lin)(lin)(lin)(lin)貼近雙眼；有(you)(you)(you)五(wu)片(pian)(pian)(pian)(pian)(pian)(pian)(pian)下唇(chun)鱗(lin)(lin)(lin)(lin)，接觸頦部(bu)。腹(fu)部(bu)有(you)(you)(you)213至(zhi)(zhi)245片(pian)(pian)(pian)(pian)(pian)(pian)(pian)鱗(lin)(lin)(lin)(lin)片(pian)(pian)(pian)(pian)(pian)(pian)(pian)，雄蛇有(you)(you)(you)37至(zhi)(zhi)47片(pian)(pian)(pian)(pian)(pian)(pian)(pian)尾(wei)鱗(lin)(lin)(lin)(lin)，雌蛇則(ze)有(you)(you)(you)29至(zhi)(zhi)35片(pian)(pian)(pian)(pian)(pian)(pian)(pian)尾(wei)鱗(lin)(lin)(lin)(lin)。

生活習性

灰(hui)藍扁(bian)尾(wei)海(hai)蛇棲息于海(hai)洋之(zhi)(zhi)中(zhong)，水深不(bu)超過(guo)10米(mi)，多于夜間出(chu)沒沿(yan)岸沙(sha)灘、巖礁間。日間時(shi)候(hou)，它們多躲藏于海(hai)岸邊的巖縫間休眠。以(yi)海(hai)蛇科而言，灰(hui)藍扁(bian)尾(wei)海(hai)蛇擁有(you)(you)較強的陸行本領，即使離海(hai)有(you)(you)數十米(mi)之(zhi)(zhi)遙，仍(reng)有(you)(you)可能找到他們的蹤影。捕食方(fang)面以(yi)一般魚(yu)類為主。

灰藍扁(bian)尾海(hai)蛇擁有強烈(lie)的(de)(de)(de)神經毒素，但由于它們的(de)(de)(de)口部細小，攻擊性較低，因此對人類的(de)(de)(de)威脅并不特別嚴(yan)重。

生長繁殖

灰藍扁尾(wei)海蛇屬卵(luan)生蛇類(lei)，全年(nian)可繁(fan)殖，雌蛇每(mei)年(nian)均于海岸巖石間產卵(luan)，每(mei)次約能誕下4-20枚蛇卵(luan)。

分布范圍

灰(hui)藍扁尾(wei)海蛇主要(yao)分布(bu)于印度洋至太平洋一帶(dai)的海域，孟加拉灣(wan)到馬來半島沿海、巴(ba)布(bu)亞新幾(ji)內亞、澳大利亞、菲律賓、斐濟、湯加、中國南部、日本沿海以及臺灣(wan)沿海等地。