whats so great about Octonauts?

I remember watching it when I was like 7 or something only knew it as just some other kids show I mean I liked it but it didn’t stand out that much is there like some crazy good writing I missed or genuinely really good characters? cause all I remember is the penguin was like a doctor and the cat was really annoying and the polar bear never did anything

the episode I remember best was the one they went to see some other penguins for some reason and they had stuff about rocks and two penguins fought over their rocks idfk