Bicolor blenny going bezerk over tunnels!!!

[ginpang]

I've had this guy for two years with shrimp goby , clownfish , jawfish and clown gobies . He's always been nosy but pretty cool with everyone .

I got a second bicolor blenny hoping to have two of opposite sex in the same aquarium, since then he's been a real piece of work.
At first he was just bothering the newcomer, then I put him in qt to cool down ... When I put him back a week later he was better but started digging and cleaning burrows like a madman.
I thought to myself he's preparing for mating[emoji4]

Now he's just an ******* to everyone. This morning he has evicted the jawfish and the yasha from their den. So now he claimed all burrows and patrols all 4 of them. He terrorizes everyone except the clownfish pair.

The female blenny is obviously not ready.

Has anyone have their blenny lose his marbles?

I'm giving myself one day to decide what to do with him... So far removing him seems the best option.

Any suggestions are welcome ...

Thank you

 

[ThRoewer]

I know that they can be jerks, but usually just to other members of their species.
I only kept them with larger fish and there they couldn't act out too much.

BTW, how did you know that you had a male and how did you know the one you added is a female?
I'm trying to get a pair of these, but so far it didn't work.

 

[ginpang]

Bicolor blenny going bezerk over tunnels!!!

That's what I don't understand ... He's always been o.k. With everyone no matter what size they were , exactly as the last one I previously owned.
And always lived high up in a rock crevasse where he could observe everything.

This one started getting interested in ground burrows when I introduced the other one.

Well as for the male and female....

I'm still uncertain that the second one is a female for sure since it is still a juvenile.
The first one is big, has a tail with streamers and just before the anal fin had something that looks like an ovipositor on a clownfish , which should be the male genital papilla.
The smaller almost all brown second one does not appear to have the same appendage but like I said it is still juvenile... It could turn out to be male also. But since the big one hasn't killed it, and the compulsive burrow digging that began when I introduced the second one could confirm that the second one is female.

Then again it could also indicate competition to establish dominance over another male if a ( real ) female ever shows up!

 

[ThRoewer]

Blennies don't change sex, they are born either male or female.
Also, with Ecsenius species both sexes look usually the same.
Blue Zoo sells bicolors by male and female, likely sexing them by color and streamers, but I'm not sure they always get it right. The male and female I got from them look identical to me so far.
The only sure way to tell them apart I know of is the distance between genital and anal openings. But for that you pretty much need to put them under a microscope. I guess I got to do that before putting them together.

 

[ginpang]

Bicolor blenny going bezerk over tunnels!!!

I didn't mean it was going to change sex , I meant perhaps genitalia that does' nt look the same as the other could develop over time and end up being identical to the other one...