The female octopus can store the sperm and fertilizes her eggs once her den is ready. Giant Pacific octopus mothers sacrifice their lives after laying their eggs in deep-water dens. From the video's description: A giant pacific octopus mother who lived just across from downtown Seattle had her hatch right under the noses of local divers. Small egged octopuses lay a large quantity of eggs- anywhere from 15,000 to 500,000. The giant Pacific octopus can lay tens of thousands of eggs in her one and only brood. In 1977, researchers removed this gland and found that the octopus' mothering instincts disappeared. Octopuses only have one breeding season, in which the female lays eggs, watches the eggs till they hatch, then dies. Each one is an individual octopus egg. During these times, which can last 2 to 10 months depending on the octopus species, the female does not eat and slowly wastes away. ___ Giant Pacific octopuses only live an average four to five years in the wild, yet they are still considered one of the longest-living octopus species. The peak time of year for egg-laying, or spawning, is from April-May near Alaska and from May-July near Japan. It only takes two or so octopuses out of each clutch to survive and reproduce to keep an octopus … It has to do with the optic gland between the octopus's eyes; a gland similar to the pituitary gland in humans. Octopuses typically die shortly following breeding. She places these eggs along the wall of a chosen den. She will seal herself inside her den using rocks, and once the eggs are fertilized, she will lay anywhere from 20 000 to 100 000 of them in strings on the upper side of the den. Some do, some don’t. It will take her a couple of days to lay all of them. She can lay up to 100,000 eggs. She abandoned her eggs, started feeding again, and went on to live a much longer life. They live with their eggs for up to seven months without eating, ensuring that streams of oxygen- and nutrient-rich water waft over them. As the female octopus continues to lay her eggs she appears to become conscious of the proximity of the human diver. For the next several months, the female protects her eggs from predators and ensures they receive sufficient oxygen. Mothers usually die after their broods hatch. You can see how they begin to roll down the side of the coral settling along the bottom. YouTube user Seainggreen documents the hatchings of a giant Pacific octopus, which can lay up to 100,000 eggs, according to Wikipedia. After mating, a female will lay up to 74,000 eggs or more in a deep den or cave and live there for seven months watching over them. About 20,000 to 100,000 eggs, each the size of a grain of rice, will be laid. 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