To expand more on the meme side: It’s a notorious problem in spider communities that every brown spider will at some point be called a brown recluse by … less educated people. Which can lead to innocent spiders being killed just for their skin colour! Which is why there are usually rules that prohibit layman from identifying medically significant spiders.

The spider in the picture is a tarantula, so very obvious not a brown recluse. That’s the joke. It’s funny here, but seriously don’t make that joke on an actual spider community, none of the residents will think it’s funny.