[KingLudd]

Any good biologist would have said, “Marine mammals,” not aquatic mammals.

[alexander_busek]

Any good biologist would have said, “Marine mammals,” not aquatic mammals.

The authoress deliberately chose the word "aquatic."

Maybe "littoral" would have been even more apt.

Regards,

[dangus]

Lake, estuary and river creatures are not marine.

[Rinnwald]