The day octopus is found in shallow waters to depths of around 150 feet, and as its name suggests, they are diurnal. The lifespan is very short, around one to one and a half years. Reproduction occurs just once at the end of their lives. Females lay hundreds of thousands of eggs, attaching them to the substrate in the lair and tending them with care, including fanning the eggs to help oxygenate them. She does not leave the eggs to feed, and eventually dies, becoming nourishment for her young upon hatching.
This is a video clip of a heʻe that I video while at the fish pond with Paepae o Heʻeia. This is a remarkable creature, this day octopus, or he'e mauli. Just marvel at the oddly beautiful body. They're cephalopod molluscs, cephalopod meaning head-foot, which pretty much sums it up the design plan. Since they have no shell for protection, he'e have developed an extensive toolbox of defenses to help them evade predators such as monk seals, sharks, and humans. Lacking an internal skeleton, they are able to squeeze into small places and hide. Rapid getaways can be accomplished by taking in water through the mantle and forcing it out of the siphon. They have chromatophores in their skin that allows them to quickly change color and they use muscles to transform their skin texture, camouflaging into their surroundings magnificently. And when things really get tough, there is always the squirt of ink, ejected from an ink sac in the mantle. The ink can work in several ways. It may impede predators from smelling, and thereby locating, the octopus. It also can act as a screen, or be used to create a false shape, acting as a decoy as the true octopus flees. As hunters themselves, they are just as masterful. Well developed eyes, sense receptors on their arms, and chemoreceptors on their suction cups help the octopus to see, feel, and taste for its food, which include crustaceans, fish, and molluscs. Swooping down on their prey, they enfold them in their web and hold them tight with their suckers. They then inject them with a paralyzing venom and digestive enzymes which help break down the body of the prey. The he'e mauli has a sharp beak which it uses to tear the flesh.
The day octopus is found in shallow waters to depths of around 150 feet, and as its name suggests, they are diurnal. The lifespan is very short, around one to one and a half years. Reproduction occurs just once at the end of their lives. Females lay hundreds of thousands of eggs, attaching them to the substrate in the lair and tending them with care, including fanning the eggs to help oxygenate them. She does not leave the eggs to feed, and eventually dies, becoming nourishment for her young upon hatching.
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