It is highly unlikely that there could be a massive iceberg off St Francis Bay, a top South African Weather Service marine researcher said on Tuesday.

On Monday, the crew of a fishing vessel, the Ntini, reported seeing a massive iceberg -- estimated at 25m in length and 25m high.

It was last seen at 6pm on Monday, 35 nautical miles south-east of St Francis Bay.

National Sea Rescue Institute (NSRI) spokesperson Craig Lambinon said there had only been one sighting thus far, and he could not confirm the find.

Air force pilots on the lookout for the iceberg on Tuesday did not see anything of the sort from the air. Lambinon said the air force did not specifically go looking for the iceberg.

"The air force was due to fly in that area anyway and not specifically to look for the iceberg. They were requested to keep a lookout for it, but they did not find or see any iceberg," said Lambinon.

Read more at: Mail & Guardian Online