You have a swimming speed of 50 feet. The speed is halved if wearing medium or heavy armor

You have a climbing speed of 15 feet. To use this speed, you can’t be wearing medium or heavy armor, Do to your suction cups you have a good grip off things giving you advantage on grappling rolls although not saves instead you have disadvantage and additionally you have advantage on checks to hold on to things

When determining your character’s ability scores, increase one of those scores by 2 and a different score by 1, or increase three different scores by 1. Follow this rule regardless of the method you use to determine the scores, such as rolling or point buy.

The “Quick Build” section for your character’s class offers suggestions on which scores to increase. You’re free to follow those suggestions or to ignore them. Whichever scores you decide to increase, none of the scores can be raised above 20.

You have advantage on stealth checks

The octopus can breathe both on land and water