A recreational fisherman who filmed two bloated, dead crocodiles in a remote Northern Territory river is concerned the deaths may have been caused by an "archaic" form of commercial fishing which he said was decimating wildlife in the area.

Key points: A recreational fisherman is concerned about a possible link between crocodile deaths and commercial netting

A recreational fisherman is concerned about a possible link between crocodile deaths and commercial netting The Northern Territory Seafood Council says commercial fishers avoid interacting with crocodiles

The Northern Territory Seafood Council says commercial fishers avoid interacting with crocodiles The latest NT commercial fishing bycatch report is due on May 28

Anthony Bergamo has been fishing in and around Buckingham Bay in remote East Arnhem Land since he was 14 years old and said he is worried about his recent discovery.

While out on his boat on Thursday afternoon, he said he saw the dead crocodiles and a dead shark floating in the water.

"First we saw one croc that was dead up in the mangroves and five minutes later we saw another croc that was dead belly up in the middle of the river."

"I reported it through Fishwatch and the rangers and hopefully the rangers will go out there and try and find the crocs."

Mr Bergamo, who owns a recreational fishing business, said the area is changing for the worse.

Anthony Bergamo filmed the dead crocodiles. ( Supplied )

"Back in the day we used to have 16-foot crocs that would come up to the back of the boat every night, the clients used to love it and you got to see nature," he said.

"We saw one crocodile yesterday which was about 2 feet long, you know, and that is just regular now that there are no crocs here."

He has concerns there might be a link between the deaths and the commercial netting which runs in the area.

"If you talk to [some] fisherman in the Territory they're going to tell you that netting has got to be stopped up here, it's an archaic form of fishing, it's blatant disregard for the whole river."

"I've been up rivers and [commercial fishing vessels] never pulled their nets out and it was just … barramundi floating down the river dead, it's sickening to see."

"And then to go and see dead crocodiles … when you don't see any [live crocodiles and] you are commenting to your mates, 'where are the crocs?' and then you see them dead, it's not right."

Commercial fishing vessels must have a licence to commercially fish for barramundi in the NT and are legally required to log any bycatch, such as crocodiles, sharks and turtles.

The Northern Territory Seafood Council commercial fishers avoid interacting with crocodiles, and the industry has best practice guidelines to minimise the impact on crocodiles.

"The death of two crocodiles is regretful and not an outcome anybody wants," said CEO of the Northern Territory Seafood Council Katherine Winchester.

"Fortunately, a number of steps can be taken to reduce interactions, improve protection and reduce the impact of the fishing industry on threatened, endangered or protected species."

The latest reporting on commercial fishing bycatch in the Northern Territory is due to be delivered on May 28.