FISHING trawler skipper Rangi Pene knew he'd netted the catch of the day when he winched his net up from the ocean floor.
About halfway down the net was a large mass which, as the net drew closer, Mr Pene knew was not your everyday fish.
It was in fact the catch of a lifetime - a 6m long, 230kg squid, which is now in a freezer in Portland, waiting for collection by Museum Victoria.
"As soon as we seen it, we (thought) we'll have to save this,'' the excited skipper said.
The trawler, Zeehaan, was fishing about 40km off the coast of Portland in Victoria's west, when it netted the squid on Sunday night in waters more than 500m deep.
"What we do is we shoot the net away and we tow the net for five hours,'' Mr Pene, 55, said.
"When we winched it up about six o'clock, we seen a big ball in the net, halfway down.
"We were wondering, what's this?
"We got it closer to the boat and it was that squid.
"You couldn't put it anywhere down in the ice room with the rest of the fish because it was just too big."
Colossal squid grow to be shorter, but much heavier, than giant squid, which are a different species.