“浅海”常见的英文表达是 shallow sea 或 neritic zone(“neritic zone”是更专业的海洋学术语,指靠近海岸、水深较浅的海域 )。
例如:
Many species of fish live in the shallow sea.(许多种类的鱼生活在浅海。)
The neritic zone is rich in marine life.(浅海区域海洋生物丰富 。)