You should see clownfish fry frequently, but normally they get eaten.
Mandarns spawning.
You may be able to see the male bluestripe pipefish here pregnant. He is almost always pregnant and is pregnant now but the fry are so tiny I have never seen them. I think you need the Hubble Telescope to do that.
All healthy paired fish spawn all the time. It's what they are supposed to do and not very special. If they don't spawn, that is a problem.
The Ruby red dragonette is also pregnant here
Mandarns spawning.
You may be able to see the male bluestripe pipefish here pregnant. He is almost always pregnant and is pregnant now but the fry are so tiny I have never seen them. I think you need the Hubble Telescope to do that.
All healthy paired fish spawn all the time. It's what they are supposed to do and not very special. If they don't spawn, that is a problem.
The Ruby red dragonette is also pregnant here