I posted it on different community but it got removed before I can get an actual answer. So, I'm hopping that someone will have the right answer here.

I feel there must be some context I am missing. Why is this funny?

All i can see is that spongebob has 4 finger not 5, what am i missing?

It's a pun i think

Greetings, I have been pondering for weeks on end now, I simply don't understand the joke.

Am I missing a pun here? I dare to say that I'm fluent in English, but this one just goes miles over my head. Is there a phrase that sounds similar to "Anne Boleyn" which means to be unfit?

This was taken from a "Scenes we'd like to see"-compilation, so maybe I have to find the entire episode, and see if there is a context that's missing, but I thought maybe you lovely people can help me out faster.

If you need the original video, I can provide you with a link.

Please help me and thank you in advance!

Edit: My jove, you were quick! Thank you so much! I can rest now.

I post on youtube shorts like vlogs and stuff. and i recently got this comment. I didn’t think i’m very fat as I’m in a healthy weight range, but maybe i am? I included a photo of me from the video and a photo of the food i ate. I guess i didn’t realize how fat i am?

All i can see is that spongebob has 4 finger not 5, what am i missing?

I assume it's something to do with statistics? But there's a lot of lingo I'm not hip to here.