Robb Bloomfield wrote:

Well, the three fat ones look like this:
http://www.aquariacentral.com/specie..._page_ view=1
And the other one looks like this:
http://species.fishindex.com/photo_2...a_shark. html
So maybe they're just growing up fast?


Compared to the larger sharks, the thin one looks emaciated. Is it
eating as much as the other two? I've never seen an adult Bala Shark so
thin. Were the other ones as thin as the fourth before?

If the others are really pregnant then you are one lucky fish keeper. I
can only presume the fourth has been a very, very busy fish indeed!

Nikki