Baby Axolotl help

[Ellie2]

Hello
Could someone please give me some advice .
I have three adult axolotls , i've had them around three years with no problems .
I recently was given some wild type axoltol eggs from a friend and now have 25 babies who are around 2 weeks old .
I've noticed some of them have some strange bright red colour behind their gills , i was wondering if this is normal , or if there is something wrong as not everyone of them has it .
They're fed on bbs , and are kept in tubs with around 4/5 babies in each one , they have daily 50% water changes ( with de-chlorinated water ) , and a plant in each one for oxygen .
Could someone please tell me what these red marks are , as im quite worried .

Here's some pictures of them ,you can see the red marks quite clearly :

http://www.caudata.org/forum/members/ellie2-albums-2-weeks-old.html

Thankyou
x

 

[kirsty]

That red mark is one of their organs - can't remember which one but I remember seeing it on here before. So nothing to worry about Baby axies are soo cute I wish I had got my ones that little

 

[memojo1979]

I replied to the thread on the introductions area, but for the benefit of anyone else asking the same question, I'll add my reply here too

The heart is on the axie's left + the liver is on the right, both can be seen through the skin of tiny axies - if fed on bloodworms, you can see the stomach as red too
Here's a link to the biology page of axolotl.org, which shows a "cut-away" diagram of an axie body - Axolotls - Biology

 

[Ellie2]

Thankyou )

Yeah they are lovely little things ^^