The Guardian reports that Nauru's move comes after an alleged illegal operation by a Taiwanese ship caught near its waters by Greenpeace last week.
Transhipments enable fleets to remain in, and plunder, ocean fishing grounds for years at a time while dodging mechanisms which monitor their catch
The Nauru Fisheries and Marine Resources Authority says the crackdown on vessels unloading their catch to "motherships" at sea would help "end the laundering of fish" by high seas "pirates".
