Input (grade 13): The Seven-arm Octopus (Haliphron atlanticus) is the largest known species of octopus based on scientific records, with a total estimated length of 4 m and weight of 75 kg.
Output (grade 11): The Seven-arm Octopus (Haliphron atlanticus) is the biggest known octopus, growing up to 4 m and weight of 75 kg.