They are very cute, and we won't smack you, lol YES YOU ARE ADDICTED, "fish hoarder" lol, like us

They won't stay small, they are babies now and they will grow pretty fast; we got ours in March they were only 4 cm small, now they are  over 10 cm in just 8 months.
The one with the compact tail is a common, the other ones are comets, I cannot see whiskers which identify a koi.

According to the number of fishies you'll need at least an 80 gal tank and if you want to put them together with your other ones add 10 gal for every other fish   

thanks ya'll.  Sounds like I need to start attending some meetings. lol    I'm  thinking of  them having their own tank away from my "biggies"   don't want to stress out Kissy & her bunch by adding strangers.    2  big tanks will be prettier than 1  monster 1  I think.    After  I get them  bigger I may  give a  pair to my brother to put in his 30 gal. so he can have a  cool pet to keep him company.

The "blackish" fishy   ,my 4 year old named him,TUNA, lol;  seems to be a little less black so maybe  he's  been sick &  the water is  fixing him??

What feeding suggestions do ya'll have to  promote good growth rate?

Is it true that adding salt & a heater to tank makes them grow?

I agree with Nossie lots of protein and veggies! I've been feeding my Ryukin a diet consisting of sinking pellets - Nutrafin Max Goldfish Sinking Pellets  (which I soak until they are spongy feeling and then feed), frozen peas (that I add boiling water to for about 15 minutes, cool and then remove the shell and feed the halves usually every other day), and freeze dried blood worms - Hikari Blood Worms there is so many things you can feed them and having live plants really gives them an extra boost both as food and as a benefit to water quality. I will be getting a few plants soon myself for that reason.

Sadly we're down to only 5 of the newbies.   Unfortunately Tuna was 1 of the ones to pass     My 4 year old is distraught.   After  losing 3 fish in as many days  I decided to move them to another tank  in case the quarantine was just too much on them.   I'm no good with salt      

We'd lost 2 & the water tests were fine. Then  yesterday  the   levels were off so I did a 50% water change & added a half a teaspoon  of salt.  Then we lost 2 more.    Salt  is  a weak point for me  using it with freshwater  I forgot it doesnt evaporate or get filtered so I'm thinking I should've just changed water without adding more salt to the quarantine tank.   I dismantled the whole tank  today  (after I moved the fish to a new one without salt)  & am starting it completely over changing colors, decor etc.. &  not using it as a "hospital"  I'm going to let my daughter use it for guppies or neons instead.      I simply will NOT  buy more new fish  so I wont need to quarantine.

They appeared to be in good health.  No  torn fins  or spots  no signs of illness until  after  the water change 1 was sitting on the bottom.

I always added a few teaspoons of salt into my quarantine tanks. BUT, I dissolve it in a little cup of tank water (or in a bucket of fresh water when performing maintenance) and everything has worked perfectly for me, all the fish I've bought so far are alive and healthy!
So I would agree with Minde that so many fish might just have overloaded the system or something. Don't be scared of buying new fish just because it went wrong this one time, that's probably just being a bit unlucky

Or, you could look around for a smaller private owned shop!
I've bought all my fish from this small and great shop where the staff really knows what they're talking about! I haven't even had to quarantine any of them Most bigger pet stores have less time and knowledge to care about the fish so it's very common that you happen to get some sick ones home |:

What a lovely childhood memory I am sorry to read that your new fish have all but been wiped out - how sad for you and your little girls. I wish you all the best with your remaining one, do take care

Agreed Nossie, the smaller shops are so nice and I enjoy shopping in them to support the little guy in the big world of box stores. We have a local family owned business nearby too and I've been getting almost everything for my birds and now fish for years. Lovely people and a very personal experience since the family has put their heart into the shop. They also won't sell an animal to just anyone. You are interviewed if you would like to buy a bird and they make darn sure you have everything you need to set up a tank safely That's so funny I had a guinea pig too as a child

Oh look at the wee piggies!!! They have such character the little darlings ♥

Well George is on the left..he is an American Satin and Spaz is on the right...he is a Texel.

aww...I'm so sorry you lost them all!
That is so heartbreaking...I know!
Well hopefully you get heathier hardier fish next time!

Awwww...such cute piggies!  wheeek!
Actually Curry is a Golden Agouti American!  How lovely!

Went to the pet shop today wow what a long trip  but worth it. I pet a sweet little guinea pig the girls begged me to get  but wasnt about to happen  uh uh  no more critters lol  In a  failed effort to please them we got 6 more fishies LOL.  Of course they're technically mine I guess .  LOVED  the shop owner very helpful  & knowledged in Goldfish. Helpful feller  advised me with a better method  of how to  not do the salt tank so they can be immediate friends. He'll definitely being seeing a lot of me.  They didnt have an extender 4 my filter but  will order me 1 as well as a small heater 4 the  guppies  & another tank set up  hehehe  Yeah I know addict here.    Found some new species I liked  my try them out next time  but this trip  we came home with diff food & treats  got some of them sinking pellets  mentioned on here  & a new  bubble wand  I LOVE bubbles..     The new batch  consist of 3 comets  1 white with red dot on head ( Dottie),  2 gold with white patches  1 has solid white tail  they're named  Abbbey & Cadabby,  ;
3 feeder fish 1 solid white-(Gabby)   2 "blue" &  orange (Suede & Cocoa).   Will post pics later when they settle in

Didnt do a quarantine tank this time  3 biggies went in with Kissy & gang & the 3 feeder went into the  "hospital" tank we'll try to get them BIG then  put everyone into a monster HUGE tank or pond together.   Here's hoping things go better with healthy fish   &  no salt tank .

toomanypets: I'm so happy you finally found a good shop to go to! Great!
By the way, could you tell me about the technique the shop keeper told you about? The one skipping quarantine.