this shark has a long, narrow rostrum and its first dorsal fin
神经系统总论教学课件06脑干外形
2 10:27 来自 英语点点通超话 关注 【鱼的不同部位英文表达】caudal
more than 10 fin spines on its dorsal fin, flat or round caudl
body fusiform or dorsoventrally compressed; caudal finhetero
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