E. dofleini is distinguished from other species by its large size. Adults usually weigh around 15 kg (33 lb), with an arm span up to 4. 3 m (14 ft). The larger individuals have been measured at 50 kg (110 lb) and have a radial span of 6 m (20 ft) American zoologist G. H. Parker found that the largest suckers on a giant Pacific octopus are about 6. 4 cm (2. 5 in) and can support 16 kg (35 lb) each. The alternative contender for the largest species of octopus is the seven-arm octopus (Haliphron atlanticus) based on a 61-kg (134-lb) incomplete carcass estimated to have a live mass of 75 kg (165 lb). However, a number of questionable size records would suggest E. dofleini is the largest of all octopus species by a considerable margin, including a report of one up to 272 kg (600 lb) in weight with a 9-m (30-ft) arm span. Guinness World Records lists the biggest as 136 kg (300 lb) with an arm span of 9. 8 m (32 ft). A UN catalog of octopuses sizes E. dofleini at 180 kg (396 lb) with an arm length of 3 m (9. 8 ft).
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