Can someone ID this for me?

[KaeJS]

It looks like some type of branching algae.
What I have noticed is that if you remove it from water and it touches air, it turns black within seconds.

https://imgur.com/a/9CeKD

 

[Fresh2o]

Looks like bladderwort. It's a nuisance. Got it from a plant shipment. Fragments easily, so care mush be taken when removing it. Grows rapidly!
That and duckweed are my least favorite plants.

 

[KaeJS]

Thank you!

After googling your suggestion, that is exactly what it is. You are right!

10 years in the hobby and I have never come across this before... Never even heard of it!

Thanks again!

 

[Coursair]

Bladderwort ( Utricularia) are a carnivorous plant. Your fun fact for the day. Harmless for fish...can take tiny insects.
http://botany.org/Carnivorous_Plants/Utricularia.php

 

[bullyboy]

Some people sell it as a "carnivorous carpeting plant" and "conversation piece"

http://carnivorus-plants.wikia.com/wiki/Utricularia_graminifolia