A further two suspected asylum seekers have been detained by police this morning, having spent two nights in the Daintree Rainforest after their group abandoned their boat.

A total 17 people have been detained and authorities believe everyone being sought has been found. Further patrols are being conducted in case there are any others.

A number of those detained have been flown to Darwin where it is expected they will be held before they are repatriated to Vietnam.

The Vietnamese fishing boat, on which the group arrived, is slowly sinking off-shore. Drone vision obtained by 9NEWS shows the boat slipping below the surface of the water.

Two suspected asylum seekers being detained by police on the banks of the Daintree River after their fishing vessel sank in waters off the coast of Queensland. (AAP)

The boat is leaking diesel and rubbish, including life jackets, has washed onto the beach.

Home Affairs Minister Peter Dutton has said the boat, which arrived on Sunday, was clearly a people-smuggling venture, the first to reach Australia in more than 1400 days.

Two of the men who arrived on the boat, which sank in waters near the mouth of the Daintree River, were treated to a tour of the area by local fisherman who spotted them in the mangroves.

Justin Ward and Barry Preston said the pair waved them down as they passed in their boat while crabbing on Sunday afternoon.

"We got the blokes to pull in some crab pots for us and we showed them the sights and we had a bit of a banter -- showed them a few crocs," Mr Preston told the ABC.