"High fin cardinals" Hello again,  a LFS in the area has some cardinal fish, that look exactly like the Pterapogon kaudneri.  They are selling them at less than half the cost I usually see them for. <many people are captive raising them and they have come down on price a ton>   The only thing is that they are calling them "high fin cardinals".  They look exactly like the Banggai cardinal as I stated above that they are commonly called in my book.  Are the "high fin cardinal" and the Banggai cardinal one in the same? <yes common name>   Is there a difference I should look for to differentiate the two?  They look exactly like the Banggai that I have come to know and love and would like to buy a few if possible.  How many should I buy at the same time if they are one and the same?  I understand that to place them in an aquarium you must put them in in groups?  Is that correct to ensure that they will survive?  Or is there a specific number that would be best?  3?  5?  or does it matter? <Unless you want to make a mated pair I would only add 1 some times you can get away with 2.If you add 3,4,5,6 they will pair up like clowns do, and fight with each other. Most of the time until the other ones dies Good luck Mike H>   Thanks again for your help, Jeff