Due to the adaptive nature of octopuses, all kinds of body types can be found out there. Choose any attribute to increase by +2 and another one to increase by +1.

Triton reach maturity at 15 years of age and can live to be 200 years old. What hardly happens due to the dangers of marine life.

Triton are almost invariably chaotic, although they tend towards the good or at least the neutral.

Triton's height variation is very similar to that of an ordinary human being. Its size is medium.

Your base walking speed is 30 feet, and you have a swim speed of 50 feet, and your appendages provide a climb speed of 25 feet.

 You can breathe water and air. It also has 60-foot darkvision in water and ignores any penalty an aquatic environment might inflict. However, you should thoroughly wet your body at least once a day and take a short rest fully submerged at least once a week. Acquire an exhaustion level whenever one of these conditions is not met.

 Just like an octopus, it can change its body color freely. If used correctly, it can gain an advantage on stealth checks.

 Like a cephalopod, its body is fit for the depths and for sneaking through tight spots. Has resistance to cold damage and bashing damage. It can pass through tiny spaces without difficulty and has the advantage of escaping a grapple. In contrast, he is vulnerable to fire damage and lightning damage.

Four 10-foot-long tentacles sprout from its back. You have full control over them and can interact with items normally, acting just like your arms. Although you can hold multiple weapons at the same time, it doesn't influence the number of attacks you can make. You are proficient with your tentacles and they deal 1d4+STR bashing damage. The only limitations of the tentacles are that they cannot carry shields or perform somatic components of spells. If cut off, the tentacles fully grow in 1d10+10 days. It is necessary to have at least two full tentacles to have the climbing speed.

You can use your tentacles to perform grapples. Using two tentacles to grab a creature you use the normal rules of a grapple, but if you use the four tentacles to grab a single creature you have an advantage on the strength roll (athletics) to grapple, and the target is disadvantaged on any rolls to escape the grapple. Also, you can do an extra attack with a bonus action into creatures grasped by its tentacles.

This trait should replace Improved Grapple. You know the cantrip Poison Bast. When you reach 3rd level, you can cast the Arms of Hadar spell as a 2nd level spell. When you reach 5th level, you can also cast the Dark spell. You must complete a long rest before you can use spells from this trait again.

You can speak, read and write in Common and Primordial. It can also telepathically converse with aquatic creatures that up to 120 feet like magic "Talking to animals".