帝(di)王(wang)(wang)魟(hong)(hong),學名門(men)查江(jiang)魟(hong)(hong)(Potamotrygon menchacai),又稱帝(di)王(wang)(wang)老(lao)虎(hu),老(lao)虎(hu)魟(hong)(hong),為燕(yan)魟(hong)(hong)目,魟(hong)(hong)科,江(jiang)魟(hong)(hong)屬(shu)一種淡水魚(yu)類(lei)。帝(di)王(wang)(wang)魟(hong)(hong)分布于南美洲(zhou)秘魯,外形奇特,色(se)彩美麗,可作(zuo)為觀賞魚(yu)類(lei)。
2017年,科(ke)學(xue)家發現了(le)1萬8000種(zhong)(zhong)新物(wu)種(zhong)(zhong)。從這些新物(wu)種(zhong)(zhong)中,美(mei)國(guo)國(guo)際物(wu)種(zhong)(zhong)檢(jian)定研究(jiu)所評選出(chu)了(le)10大最奇特(te)的(de)新物(wu)種(zhong)(zhong),帝(di)王(wang)魟名列其(qi)中。
帝王魟(hong)(hong)體(ti)呈(cheng)圓片狀,尾部呈(cheng)鞭狀。帝王魟(hong)(hong)在幼魚(yu)階(jie)段(duan),基(ji)底顏色與(yu)虎(hu)斑(ban)狀花紋都比較淡,隨著魚(yu)體(ti)的(de)(de)成長會(hui)逐漸發生(sheng)顏色的(de)(de)深淺變化(hua)。長大(da)成魚(yu)以(yi)后,絢爛奪目的(de)(de)表(biao)現(xian)讓人賞(shang)心(xin)悅目。這(zhe)種(zhong)華麗的(de)(de)大(da)型南(nan)美魟(hong)(hong)魚(yu)身上所擁有(you)的(de)(de)金黃色花紋獨步(bu)所有(you)的(de)(de)魟(hong)(hong)魚(yu)品(pin)種(zhong),尾巴黑黃相間與(yu)腹部全白為(wei)其最大(da)特色與(yu)賣點,最大(da)體(ti)盤(pan)的(de)(de)直徑可達1500px,英文俗名:tiger ray,直譯(yi)稱(cheng)為(wei)老虎(hu)魟(hong)(hong)。帝王魟(hong)(hong)的(de)(de)尾柄上分布有(you)盾鱗(lin)演化(hua)出的(de)(de)盾鱗(lin)丘,最長的(de)(de)一根特化(hua)為(wei)尾刺,內有(you)溝槽(cao),遇敵時(shi)(shi)會(hui)以(yi)尾刺蟄刺敵害,同時(shi)(shi)通(tong)過溝槽(cao)注射毒液(ye),其毒液(ye)為(wei)劇(ju)毒,非(fei)常危險。
帝王(wang)魟(hong)(hong)適(shi)宜酸(suan)性軟水(shui)(shui),pH為5.8~6.5,水(shui)(shui)溫為24至29攝氏度(du),對(dui)硬(ying)度(du)要求(qiu)不(bu)(bu)高(gao),dH5–10,稍高(gao)一(yi)點也(ye)沒有關系。帝王(wang)魟(hong)(hong)對(dui)水(shui)(shui)環境(jing)的(de)波動(dong)低抗性較(jiao)差(cha),切(qie)忌突然變化溫度(du)及(ji)大量換水(shui)(shui)。同時所有的(de)魟(hong)(hong)魚類都不(bu)(bu)耐(nai)藥(yao)物(wu),所以(yi)飼(si)養中不(bu)(bu)要輕易下藥(yao)。