Comment by anon on Isekai Yururi Kikou: Raising Children While Being an Adventurer - Vol.3 Chapter 23: The Supreme Ruler of the Sea!

Same bro. but its a man without a account so I doubt we're hearing back from him

@Rin its from dolphin sperm?? im not really sure if its dolphin or shark

LE WHAT

That's only part of it.

"Marine snow is a shower of organic material falling from upper waters to the deep ocean." 

https://oceanservice.noaa.gov/facts/marinesnow.html

@Rin basically it's dead animals falling down in flakes