Yes. Sometimes the arrowana (which is about 5 inches) mouthes the krill ,
but that is about it. He won't touch anything else. I know that these fish
could go a long time without fould but how long is long. I don't wanna come
back a couple of months from now and find him or her dead because I refused
to buy guppies and it refused to eat anything else. I hope that after a
while it will catch on and start eating and instead of cruising the tank
looking for small moving prey.