No you didn't :))

Here's what Chilean naturalist Juan Ignacio Molina wrote in his 1782:

This is the smallest of the New World otters, being about 1m long, weighing about 5kg. The fur is rather harsh in texture, darkest brown on the back, somewhat paler on the underside, chin, cheeks and throat. The claws are blunt and the ends of the toes are free of webbing. The tail is relatively short compared to other otters. The head is flattened, with a short muzzle and abundant, strong whiskers - this gives it the name Sea Cat.

https://www.marinebio.org/species/sea-cats/lontra-felina/

I'm afraid that's not how Taxonomy works lol, if you want to challenge a species' classification you can submit a proposal to the the World Register of Marine Species (WoRMS).

No, it's not the same thing lol.

Sea Cats are marine otters of the weasel family (Mustelidae).
Sea Lions are marine pinnipeds of the otary family (Otariidae).

Do a Google Image search for "Lontra Felina" to see a Sea Cat.
Do a Google Image search for "Zalophus Californianus" to see a Sea Lion.

Sea Cats weigh <10 KG, have cat-like noses, smaller eyes, fur, tails and cat-like paws.
Sea Lions weigh ~350 KG, have dog-like noses, bigger eyes, whale-like skin and flippers.

Well it's a sea lion but thank you