Weird marks on fish

juanmanuelsanchez · Mar 17, 2018

Today I found my bicolor blenny with this marks in the side of the head / body.

It looks like hairs... But I don't know what it could be.

Thanks in advance for the help.

Big G · Mar 17, 2018

Looks like lymphocystis
https://www.reef2reef.com/threads/lymphocystis.257461/#post-3043397

deedubz · Mar 17, 2018

Not helpful at all but...
I LOVE that second pic. "I are blenny, hear me roar!"

ngoodermuth · Mar 17, 2018

Could he have maybe scraped himself against something? Looks like scratches maybe? I would probably just make sure he is eating well, and soak his food in vita-chem or selcon until it heals.

If it gets worse/starts to spread, he starts breathing heavy, or you see any redness around the wounds you might want a QT and antibiotics at the ready.

juanmanuelsanchez · Mar 18, 2018

I'm starting to think it's aggression. Today the tail have bite marks.

I keep everybody well fed I don't know why I'm getting aggression.

Maritimer · Mar 18, 2018

You've got two blennies - the bicolor and a midas - both of which have quite a bit of yellow, and (at least sometimes) can have darker front ends. They're having a go at it in that last photo. The bite out of the bicolor's dorsal fin is classic midas aggression - they come down from above to nip.

I'm also wondering if Mr. bicolor didn't get into a tussle with a bristle worm, which would explain what looks like hairs.

~Bruce

HotRocks · Mar 18, 2018

Maritimer said:
You've got two blennies - the bicolor and a midas - both of which have quite a bit of yellow, and (at least sometimes) can have darker front ends. They're having a go at it in that last photo. The bite out of the bicolor's dorsal fin is classic midas aggression - they come down from above to nip.

I'm also wondering if Mr. bicolor didn't get into a tussle with a bristle worm, which would explain what looks like hairs.

~Bruce

Id say that pretty much sums it up! I like your theory!

juanmanuelsanchez · Mar 18, 2018

Well my planing was to get a tailspot blenny. Now I don't know if that's a good idea.

My first bicolor was a grew guy with great personality. This one gets bullied

Kamden Uelton · Mar 18, 2018

Give the bully blenny suspension for 1 week! Or Expel him from the tank

juanmanuelsanchez · Mar 18, 2018

Well that would be the midas blenny. But it's a wonderful creature to observe

ngoodermuth · Mar 19, 2018

You could try reintroducing him after some time in an acclimation box. Or maybe rearranging rocks or adding some new hiding places/territories.

But sometimes, it just doesn’t work, and one fish has to go :/