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Giant Pacific Octopus

These cephalopods are total brainiacs! Strong senses combined with a high level of intelligence allow giant Pacific octopuses to remember landmarks, navigate their surroundings, and use objects as tools.

 

Giant pacific octopuses are found in the North Pacific Ocean. They are generally found along the coast in shallow tidal pools to depths of 110 meters (360.9 feet), but they have also been found over 1,500 meters (4,921.3 feet) below the surface. They are often found in fields of kelp and dwell in dens and crevices with soft ground made of sand, mud, or gravel. True to their name, these giants are larger than any other species of octopus, with arms that can span up to 9.5 meters (31 feet) across. They are normally reddish but can change in color when camouflaging with their surroundings.  
 
Males may breed with several females, but females mate only once in their lifetime — after mating, females dedicate the remainder of their lives to tending to their eggs. Over several days, females lay 20,000 to 100,000 rice-shaped eggs in clusters that they hang from the ceiling of their den. Females remain with the eggs until they hatch, guarding them from potential predators and using her syphon to aerate and clean the clusters. Hatching can take up to a year depending on water temperature, which dictates when hatching occurs. The cooler the water temperature, the longer the embryos will take to develop and hatch.  
 
Giant Pacific octopuses have sharp vision and an acute sense of touch and taste — their arms are equipped with hundreds of tasting suckers — which this species uses to help detect prey. These octopuses are considered generalist foragers with their diet primarily composed of clams, crabs, fish, and squid. 

 

 

Although the giant Pacific octopus is currently listed as Least Concern by the IUCN Red List, overfishing poses a potential threat to its population. These octopuses are heavily fished in some regions, and while scientists believe their numbers are stable, little is known about their overall population size. More research is needed to understand how fishing may be impacting this remarkable species.

 

 

Responsible fishing is vital for healthy and abundant oceans. Oceana works around the world to mitigate the effects of overfishing and increase the number of fisheries with management plans and catch limits. Learn more about our work to promote responsible fisheries here.

 

 

 

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