Your Dexterity score increases by 2, and your Intelligence score increases by 1

Otters gain independence from their mothers at around 6 months of age and live typically 15 to 20 years, with the maximum being 23 years.

Good and evil tend to be something of a moot point for most Otters, as they're far more busy contemplating where their next meal of sea urchin will come from than loftier concepts like morality. They do have a strong social structure, however, which tends to be helpful when making sleeping rafts of hundreds of Otters all holding hands which gives them a lawful bent.

Adult Otters tend to be 3'11" to 4'11" in length. Males can weigh from 49 to 99 pounds while females tend to weigh 31 to 73 pounds, making them the heaviest mustelid. Your size is Small

Your base walking speed is 25 feet. You also have a swimming speed of 35 feet.

Though Otters have a decent sense of eyesight, its long sensitive whiskers tend to be more important in dark conditions. You have Blindsight out to a radius of 20 feet.

Of the many rituals of the Otters, the most sacred is the forming of a raft. By holding hands and sharing their strength on the ocean's surface when they rest, they can keep themselves from drifting away into more dangerous waters and reinforce social bonds. You can treat any hit dice rolled through a short rest as having rolled their maximum if you hold hands with a friendly creature through a short rest.

From a young age Otters are taught the finer points of smashing things into other things to break them apart. While this generally takes the form of smashing open abalones and urchins with an Otter's favorite rock, this has been found to extend to more impressive feats of smashing. You have advantage on melee attack rolls against constructs and you do double damage to inanimate objects.

As a marine species, Otters are excellent at holding their breath underwater. You can hold your breath for five minutes plus a number of additional minutes equal to your Constitution score, with a minimum of 0

Though the adorableness of the Otter is something of a permanent state for them, they have learned to make calculated displays of cuteness in order to render foes helpless before their tiny hands and fluffy faces. At 3rd level, as an action, you can attempt to charm up to 3 creatures you can see with a display of cuteness, such as holding hands with another creature or attempting to smash open a scallop on your belly. Targeted creatures must make a Wisdom saving throw. On a failed save, the creature(s) are charmed for 1 minute, fawning over the Otter and seemingly ignoring anything else going on around them. A failed save only results in a confused look. The save DC is 8 + your proficiency modifier + your Intelligence modifier. Any creature that does not possess eyesight automatically succeeds their save. You must complete a long rest before using this ability again

The most prized feature of the Otter is their fluffy coat of fur, which is the comparatively thickest of any mammal save perhaps the woolly mammoth. As a result, both above and below the water, Otters are a walking fuzzy bulwark against the cold. You have resistance to cold damage and are immune to the effects of extreme cold as detailed in the Dungeon Master's Guide.

Your creature type is Beast rather than Humanoid.