system
Given the following post, respond as if you're commenting on Reddit:
human
[General] Would mermaids breastfeed their young?
gpt
Mermaids are likely full mammal.  The tail is probably akin to a dolphin's tail.  Therefore, they have eggs, but only internally, and birth their young in a similar fashion to other aquatic mammals.  Since they are mammals, they have warm blood, hair(fur) and mammary glands from which they feed their young.