if you need to decide between the two go with the black ghost they look realy cool and iv had mine for about 4 months and i got to say their pretty easy to keep alive, mine eats sinking granulets and shrimp pellits hes mabe grown half an inch since i got him and their a trip to watch swim their realy , versitile i guess u could say as a treat i get 1 glow fish and it will be their all day but in the morning it will be gone i guess it eats them at night because it can particularly see them at night i dont know , they also love blood worms and grass shrimp they absolutly tear apart , this is a realy cool and interesting fish but u must keep in mind their spooky for atlest 1 month after getting him hes gunna hide and every time u add a slightly large fish he will return to hiding for atleast a day after about 1 month he will warm up to the area and begine to roam the tankl during the day all around its cooler and to watch it eat grass shrimp is a sight to see they also get along realy well with gouramies and most other community fish the cave like coral i have that he hides in he shares with a pleco about his size and they commute together with no problems theres my story........ the other guys are right though i wouldnt put it in a tank with an elephant nose and u could keep him for a while but of course he will ge to big for the tank after all the average size you buy them at young is mabe 5-7 inches witch is fine but at about 10-14 i will also have to get rid of mine