How big is a full grown octopus?

Answer 1

Full grown octopi vary greatly in size, depending on the species. Some are small enough to fit into your hand and others, like the giant Pacific octopus, can grow to weigh more than 500 pounds.

Answer 2

The giant Pacific octopus is the largest octopus species. Typical weights for a full-grown giant Pacific octopus range from 70 to 110 pounds. Most are less than 16 feet across from arm tip to arm tip.

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