That's the decision announced yesterday by a federal wildlife agency.
The pod of bottlenose dolphins took a wrong turn in June and ended up in the Shrewsbury and Navesink rivers.
Two have died so far, and concern is growing among animal rescuers that the rest could die as well if they're not removed.
The leader of one such group says leaving the 12 remaining animals there is tantamount to letting them all die.
But the National Oceanic and Atmospheric Administration says it has been monitoring the dolphins for the past two weeks and feels they are fine.