The otter is behind an attack at the Boca Chase Development last Thursday on a an 8-year-old golden retriever named Chester, who escaped the encounter with just a few scratches.
Two more attacks, this time on two people, happened Sunday morning.
"The otter ran out and attacked the two people unprovoked," Animal Control spokeswoman Karen Buchan told the Sun-Sentinel.
There are several bodies of water in the Boca Chase neighborhood where the otter can come and go from. Animal control is trying traps baited with tuna to catch him, but so far he hasn't been found. They're also passing out fliers throughout nearby neighborhoods for people to be on the lookout for the otter.