Which Brown Macroalgae Is This?

WheatToast · Sep 17, 2021

This sprung up in my old temperate build several months ago out of nowhere (likely from a spore). It has grown slowly, yet steadily ever since. I would assume it hitchhiked on some North-Pacific seaweed.

vetteguy53081 · Sep 17, 2021

Looks like nemastoms or rosenvingia crucis

WheatToast · Sep 17, 2021

vetteguy53081 said:
Looks like nemastoms or rosenvingia crucis

They seem a little too red and the form is different.

reddevilant · Sep 17, 2021

I have no idea but it looks very interesting! lol

N.Sreefer · Sep 17, 2021

Looks alot like young kelp before it forms air bladders does it have roots?

WheatToast · Sep 17, 2021

N.Sreefer said:
Looks alot like young kelp before it forms air bladders does it have roots?

By roots, you mean holdfast? Sort of. It’s holdfast is bulb-like, similar to the holdfast of this Sargassum:
http://californiadiver.com/wp-conte...mall-holdfast-of-mature-Sargassum-horneri.jpg

N.Sreefer · Sep 17, 2021

WheatToast said:
By roots, you mean holdfast? Sort of. It’s holdfast is bulb-like, similar to the holdfast of this Sargassum:
http://californiadiver.com/wp-conte...mall-holdfast-of-mature-Sargassum-horneri.jpg

Kelp holdfast look kind of like tree roots so its likely not kelp if it looks like sargassum to bad that would be really cool always thought a mini kelp forest would make a wicked biotope.

WheatToast · Sep 17, 2021

N.Sreefer said:
Kelp holdfast look kind of like tree roots so its likely not kelp if it looks like sargassum to bad that would be really cool always thought a mini kelp forest would make a wicked biotope.

My old temperate build achieved that. My water parameters were probably not great, though, and most of the algae wilted.