Preparation materials: seawater, fish tank, oxygen pump, etc.

1, Dumbo octopus needs to live in seawater, and its living environment can be made of seawater essence.

2, the fish tank must be deep, otherwise, Dumbo can easily climb out like an octopus.

3, need an aerobic air pump, if there is no oxygen, it will immediately spray a lot of ink, and the water in your fish tank will be polluted in an instant.

What are the morphological characteristics of octopus?

There are more than 252 species of marine mollusks belonging to 26 genera in Octopodidae, and their sizes vary greatly. Octopus body is short oval, cystic and flipless; The boundary between head and body is not obvious. The head and body of octopus is about 7 to 9.5 cm, with large compound eyes and 8 retractable wrists. Each wrist has two rows of fleshy suckers. The wrist length of octopus is about 12 cm, that of octopus is about 48.5 cm, and that of octopus is about 32.5 cm.

I usually crawl with my wrist, sometimes I swim by stretching the carpal membrane, so I can hold other things strongly and use the funnel at the bottom of my head to spray water for quick retreat. The base of the wrist is connected with a webbed tissue called a skirt, and its center has a mouth. There are a pair of sharp horny palates and file-like toothed tongues in the mouth, which are used to drill through shells and scrape their meat.

Octopus can not only spray ink six times in a row, but also change its color and structure like the most flexible chameleon, becoming like a stone covered with algae, and then suddenly pounce on its prey, which has no time to realize what happened.

Octopus can use its flexible wrist to crawl between rocks, crevices and seabed, sometimes disguising itself as a bunch of corals, and sometimes as a pile of shiny gravel. Mark Norman of the University of Melbourne, Australia, found an octopus in the estuary waters near Sulawesi Island in Indonesia in 1998, which can quickly mimic into poisonous cattle such as sea snakes, lionfish and jellyfish to avoid rabbit attacks.