"Some animals live in the sea."

Translation: Μερικά ζώα ζουν στη θάλασσα.

[ArthurAzev4]

Could I say "μερικά ζώα μένουν στη θάλασσα" ?

[UralMasha]

My answer "κάποια ζώα ζουν μέσα στην θάλασσα" was marked incorrect, but it is really wrong to say so?

[troll1995]

No, it's not and it's added now. Thanks! ;)