Jan Ellen Ferrigan

Rock Snot


Rock Snot in stream

Rock Snot. (Photo: Environment Canada)

Yes, there is such a thing – and grab a big tissue, because it is spreading!

An invasive single-celled algae,  affectionately known as Rock Snot, more politely known as Didymo, and scientifically known as Didymosphenia geminata, is spreading into cold water streams and rivers in North America and New Zealand.  Until the last two decades, it was only found in N. American and European mountain streams, but now it is moving into lower elevations. And nobody knows how to get rid of it.

Like a true invasive, rock snot  is very successful in its new environments. Big problem for fishermen who get rock snot tangled in their lines and equipment. Also a nuisance for swimmers. Rock snot changes the types of macroinvertebrates (bugs) found in a stream and is a potential problem for fish that lay eggs on stream bottoms.

Rock Snot is easily spread by humans that don’t wash their boats or completely dry out waders, fishing or recreational equipment when they move waterways. Don’t be a snot spreader! Wash and dry your stuff.

See these recent news stories about Rock Snot:

“Rock Snot” Invasive Algae Found in Delaware River, Threatens Trout Fishing | NBC New York.

Rock Snot Invades Delaware River NJ.com


Author: janellenferrigan

Writer who likes to play outside

2 thoughts on “Rock Snot

  1. Checking in on your site, Jan. Good work!

  2. Jan, This does seem like something boys would be very interested in. 🙂 I think nature and science would be a great focus for your blog. Also I was thinking tying this in with the Boy Scouts could be interesting. I don’t know how you’d do it, but camping and nature are strong Boy Scout interests. This is Stephanie. My Gravatar account hasn’t been updated to my author name. I’d forgotten that I even had an account with them.

Leave a Comment

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s