4th fish for the 40B?

[Benga]

Looking for peaceful suggestions. I was thinking of getting a Diamond goby for the sand bed but not 100% sure if he'll be peaceful with my lawnmower blenny. The sand bed seems pretty established so might be a good time.

Other than that I'm not sure what will go well with my current fish. They're all pretty active. I just don't want fights in the tank lol

Thoughts and suggestions? Tank is going to be mostly softies and LPS maybe two sps

I have:
Da'Vinci Clown
Royal Gramma
Lawnmower Blenny

 

[Zeal]

Wrasse is beautiful and swim in and around the reef all day and keep the rocks pest free. They could be a bit aggressive and mine shows zero aggression to its tankmates

 

[Benga]

Wrasse is beautiful and swim in and around the reef all day and keep the rocks pest free. They could be a bit aggressive and mine shows zero aggression to its tankmates

The six line wrasse is actually one I was looking at mostly because it's one of the few wrasse I can find locally. I've just been hearing mixed review about it's aggression. I dont have any pests for it to eat so it'd be primarily on what i feed it.

The local stores have:
Sixline wrasse
Tricolor fair wrasse
Melanurus wrasse

 

[Zeal]

Ive yet to have an issues with mine. It even swims with the other tankmates. If you decide to get one get a small one

 

[Cjud7982]

Diamond gobies are great fish, very fun to watch. But your right about sharing the same swimming area as the blennie. And they can jump out of the tank i you arent careful. 6 line is on my next fish list. good recommendation

 

[ihavecrabs]

I do like a six-line, until it gets to around 2-3 years old. That's when they start getting aggressive!

Fairy wrasse would be a good option.

Melanarus might get a little large for a 40b.