symbl-data/loc/en/symbols-desc/1F419.axyml

Octopus, an underwater animal, known for changing colours and inking. Its distinguishable feature is eight legs. Octopus is generally depicted as a bright-coloured animal with a big round head, tentacles, and tiny eyes.
The number of tentacles depends on the platform, from four to eight. 
It may be used in reference to any sea monster, for example, Kraken from "Pirates of the Caribbean".