Is this cucumber spawning behavior?

[bknope]

I shined my light on my tank and this scared me at first because it looked strange.

Looking online, it seems that it is about to spawn?

I thought it was cool!

 

[Ron Reefman]

I have 2 of those yellow cucumbers in my tank (collected wild in the Florida Keys). I've never seen that behavior from mine. But after a bit of research, I agree with you, it's a spawning behavior! Very cool.

 

[Softhammer]

It’s definitely in the mood! wow lol