Realistic sea humanoids

bucking the trend of mermaids I've decided to take a different approach with my mermaids. A long time ago a group of Australopithecus diverged from us taking to the sea. some characteristics of these pseudo-mermaids" are:

• are 149.3cm (4.9ft) tall
• are a grayish color
• have a thick layer of blubber
• have human level intelligence
• have webbed hands and feet
• have some type of echolocation but can communicate like humans (optional)
• are omnivorous (but lean more to the carnivorous side)
• have slit like noses (lacking a sense of smell)
• thighs have started to become fused
• can hold their breath for up to 15 minutes (but still need to resurface for air)

Given these characteristics could such a hominid realistically exist?

NOTE: magic does not exist in my story

posted about 4 years ago

icewar1908‭

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