The main component of the ink in octopus is water, and the reason why the ink is black is because the ink contains black particles invisible to the naked eye. Therefore, ink is actually a viscous suspension and can be eaten. Melanin is a burning polymer of indole, which usually tastes sticky and fishy. You need dipping sauce to eat enough delicious food.

Octopus is also known as octopus. Octopus has a special body structure. They have an ink sac in their bodies, which is the place where ink is stored. Octopus can control the ink sac to contract and eject ink. After encountering enemies or other dangers, they will spray ink and stain the surrounding sea water black. These ink will not only affect the enemy's vision, but also paralyze the enemy's sense of smell. Octopus can take this opportunity to escape quickly or choose other ways to hide themselves.

Selection skills of octopus

1, Observe the body shape of octopus: The high-quality octopus has a complete body shape, eight claws are well preserved, and the small suction cups on the claws still have a certain suction force, so you can test it when choosing.

2, look at the activity of octopus: fresh octopus is very sensitive, you can gently tap its body surface with a small wooden stick. If the octopus can quickly withdraw its claws, it means that it is a fresh octopus. But if the octopus's reaction speed is very slow, or even no response, it means that the octopus is dead, and this octopus tastes bad.

3. Observe the mucus on the surface of the octopus: Because the octopus is adsorbed by the sucker on its paw, in order to ensure the suction, its paw will secrete some mucus. Select and observe whether there is mucus on the octopus's paw. If there is no mucus, don't buy it.

Baidu Encyclopedia-Octopus