If you feed them well 25 cm plus in 1 year, once they get large can get pretty aggressive to each other depends on their sex, when they are big enough to swallow the archers will eat them if they are hungry.preston5321;4476072; said:Hey everyone, looks like this is the place to go for aussie native info. I just picked up a couple sleepy cod fingerlings. There eating like bottomless pits. Just got a couple questions, how fast do they grow? and what is there aggression like towards each other? there currently living in a 130 gallon with 3 archers hoping they don't become snack food!