What is this worm?

[Elira_6301]

I noticed these crawling around in my seahorse tanks. Theres tons of them. The only thing in the tank was macroalgae, a berghia nudibranch, crab and snail. Are these baby bristle worms?

 

[CTAlane]

Looks like maybe a type of bristleworm, but the ones I’ve seen are usually longer. Possibly just hitchhiked from one of your tank inhabitants. Some fish, like hawkfish, will eat them as well

 

[Elira_6301]

Looks like maybe a type of bristleworm, but the ones I’ve seen are usually longer. Possibly just hitchhiked from one of your tank inhabitants. Some fish, like hawkfish, will eat them as well

They had to have come with Macroalgae. They are in the seahorse tank. They are tiny right now. Ill just let them be until it gets to be an issue.