is it possible that i have a pregnant( egg filled) female black fin shark (aka columbian shark) i have columbians in my saltwater tank and i have one that in the last few days has taken on the apearance of a egg filled catfish (as in going rirver fishing and catching an egg filled flat head catfish)..i dont even know if it is possible to captive breed columbian sharks or if its possible to rase the fry...any comments welcome because iam out in left field looking for answers here.