这条河里有很多鲶鱼，它们喜欢在泥泞的水底觅食。

There are many ___catfish in this river, and they like to search for food in the muddy bottom.

她发现自己在网上认识的那个人其实是用假身份在欺骗她。

She realized the person she met online was actually ___catfishing her with a fake identity.