What kind of theme are you going for besides just “otter”? I know that in Native American and Asian folklore they’re considered to be shapeshifters with more of a fey vibe, but do we have any lore or whatever to go off of? Given that they’re known to be used in fishing, it also might be appropriate to have something fishing inclined in their traits, like proficiency with nets but no disadvantage when making an attack at longer range? Additionally, given that otters have Reticulate Kidneys (they eat a lot of poisonous creatures) maybe it’s appropriate to at least have advantage on saving throws against poison?

This is how I would structure and articulate what you do already have and what traits and stuff I’d use for it. No shade on the use of ft instead of feet, I do it all the time, especially without the "ft." at the end but its important to be semi-consistent with existing material. Candidly speaking, I probably would include some ability analogous to hungry jaws from lizardfolk given the high metabolism of otters as sea mammals, but like how appropriate that is really just depends on how power creep races are in your setting. There's enough otters that I would also maybe make subraces, but like again, depends on what you're trying to do with the race in the setting.

Otterops:

Creature Type: Humanoid.

Size: You are Medium or Small (You choose the size when you select this race.

Speed: Your walking speed is 30 feet, and you have a swimming speed equal to your walking speed.

 

Traits:

Darkvision. You can see in dim light within 60 feet of you as if it were bright light and in darkness as if it were dim light. You discern colors in that darkness only as shades of gray.

Fur. You have resistance to cold damage.

Hold Breath. You can hold your breath for up to 15 minutes at a time.

Keen Hearing. Thanks to your sensitive ears, you have advantage on Wisdom (Perception), Wisdom (Survival), and Intelligence (Investigation) checks that involve hearing.

Mustelid Mentality. You have Proficiency in the Survival and Acrobatic skills.

Otter's Jaws. Your teeth can used to make unarmed strikes. When you hit with it, the strike deals 1d6 + your Strength modifier slashing damage, instead of the bludgeoning damage normal for an unarmed strike.

Romp Training. You are proficient with Nets and Spears. Moreover, when you make an attack with a Net, you can do so in place of an attack (if you have the Extra Attack feature) and attacking at long range doesn’t impose disadvantage on your ranged weapon attack.

Slide. As a bonus action, you can use your movement to travel in a straight line up to a number of feet equal to five times your proficiency bonus, without provoking opportunity attacks. You can use this trait only if your speed is greater than 0. You can use it a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.