i had about 40 of these in a fish tank some years ago when i was a fulltime snake catcher living in my dads units....
i had a mate come around early in the morning to come and see them,,,when he asked me where they were,,i laughed at him and called him and idiot and it was to early for his humour...\
fair enough,,,they were gone,,,my heat light had burned the silicone on the back of the tank and the whole back sheet of glass had seperated and fallen off....
people in the units had to pay me to recatch them,,,and after a week i had had all of them plus one...
the differ from a black snake is just about everything..
the only thing they have in common is the colour of there skin...
small eyes have a tiger snake type venom,,
small ones still have about the same amount of venom as a full size eastern brown...
they will congregate in large numbers..
they are quite non aggresive,,
but i find the bigger ones alot more aggresive,,
80cm long is about a huge one and as thick as your thumb.
rughly 50cm is average size..