It happened on the 'Cornucopia Majesty' as it was on an excursion just after 5 p.m. Saturday.
Police say a 32-year-old man was stabbed in the torso and a 42-year-old man was stabbed multiple times in the chest and abdomen. A 28-year-old man was also hit in the head with a bottle.
All victims were conscious and alert and were taken to NYU Langone Brooklyn in stable condition.
The boat returned to Pier 4 in Sunset Park.
No arrests were made and the investigation is ongoing.
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