Diamond Gobies

[Ximat]

I have two diamond gobies. Not sure if you can consider them a maited pair, but they are with eachother quite a bit.

My question: One of them has a yellower lower jaw with a black dot, the other one doesn't. Why? Is that how you tell their sex?

TIA

Sexing gobies is not always easy. Some can be sexed by the forward dorsal fin, the male having a spiked longer fin while the female is closer to the body and less elaborate. The easiest way as with clowns is size. The female will typically be the larger of the two.

Cheers
Steve

[zaku999]

Are Diamond Goby very shy fish? I have one which like to hide between a rock and sandbed. ...

Most gobies are at least "timid". Not uncommon for a good many of them to be guarded and not constantly out in the open. It can really depend on the tank layout/set up as well as tank mates.

Cheers
Steve

[Sparky]

They are also known to be "jumpers"... I lost one that way. Make sure you have your tank top covered

[zaku999]

Thanks guys!

I have plenty of sand with algae...

I hope he have the courage to come out to eat them soon....

[melosu58]

I had a mated pair and they both jumped out. Keep an eye out