Celestial Pearl Danio not swimming around much, is this a cause for concern?

[gurami]

 

[gurami]

Recently brought back a group of 6 CPD's and they most of them settled in well i.e. exploring the tank. But one of them seemed a lot less active; it would rest near the surface in one spot but would swim around normally when its friends come around or when I fed them food. It seems a lot skinnier than the others and the tail looks shorter too. This is my first fish tank so I am in need of your wisdom and advice. Is this a cause for concern? Should I remove the fish from the tank? Am I being too worried over this?

 

[gwand]

I have 8 CPD that shipped to me cross country. The runt of the group hid among the plants for about a week while the others swam around the tank. I would give it time. My group of CPD are very gentle creatures. They share a tank with White Cloud Mountain minnows that are more aggressive eaters and steal food away from the CPDs.

 

[On_a_dishy]

I have a little runt in the collection of espei rasbora that I bought this week. He is much smaller which makes his swimming look a little odd when compared to the others. I've got my eye on him and will give him a week. @gwand, did your little CPD eventually join the group?

 

[gwand]

I have a little runt in the collection of espei rasbora that I bought this week. He is much smaller which makes his swimming look a little odd when compared to the others. I've got my eye on him and will give him a week. @gwand, did your little CPD eventually join the group?

Yes he joined the group. He continues to use the plants to hide more than the other fish do.

 

[Sgooosh]

View attachment 315443

do you have a clearer photo? i think i see something on his tail, that may be the problem

 

[seangee]

SF describes this species as feisty amongst themselves. Although they seem timid and peaceful this is my own experience. I can almost guarantee that the healthiest looking fish in the group is the biggest male. Make sure you have plenty of tall stem plants to provide "line of site" refuge. Substrate decor such as wood and rocks help too. Floating plants do not as they do not normally go to the surface, except for when they try to get out of the way because they are injured. I would also suggest a much bigger group (20 or more). They mostly seem to attack the fins although I do occasionally see what I can only describe as bite marks on their flanks. Fortunately they don't usually die from these injuries but it can take several weeks to recover.

If you do decide to add more fish make sure that you have plenty of cover in place before you do so. The fish you buy will most likely be smaller than what is in your tank and the new males become a target for the dominant male(s).

 

[gurami]

Thank you all so much for your advice, it's been a week since this picture was taken and I can say that it has already gotten a lot better, it swims around freely and energetically now
And all I had to do was give it some time and feed it well.

(sorry this was the best shot I got of it)

 

[Byron]

I would suggest you increase the number of this species, it is a shoaling/schooling fish but one that needs larger groups than most. SF recommends at least 20, and there is very good reason for this as they explain.

Celestichthys margaritatus – Celestial Pearl ‘Danio’ (Danio margaritatus) — Seriously Fish

www.seriouslyfish.com