What fish can I add to my 40 breeder?

[hawk82]

Looking for something new to add, my last fish was added back in April. Its a 40 breeder tank, with only 4 fish- clown, banggai cardinal, royal gramma, melanurus wrasse. I tried twice to add a red firefish, but both times they ended up on the floor. I have a glass top, but somehow they got out the small cracks in the back. Open to suggestions.

 

[xxkenny90xx]

Maybe a starry blenny or a pistol shrimp watchman goby pair?

 

[Pkunk35]

I have two of these , trimma gobies from biota. A little cryptic as they are bottom dwellers but pretty fun to watch bc they Are pretty active feeders and once they get fat and color they are very good looking. Keep em in a 32g with 2 clowns, fire fish and Midas and nothing even noticed their arrival or continued existence. Very minimal impact and very much like them! Doubt they would jump too! (But all fish do I swear when you leastexpect)

 

[Uncle99]

African Anthais.
Bright orange, purple eyes, quite resilient, non jumper.

 

[hawk82]

African Anthais.
Bright orange, purple eyes, quite resilient, non jumper.

I was under the impression that Anthais need a big tank, and also a school.