Since I reviewed the first Alligator, I figured that I might as well talk about the second one.

Alligator II: The Mutation is a 1991 American direct-to-video sequel of Alligator (1980).

Deep in the sewers beneath the city of Regent Park, another baby alligator feeds on the experimental animals discarded by Future Chemicals Corporation.

Nourished by toxic growth hormones and other mutating chemicals, the gator grows immense in size and develops voracious appetite and goes out on a killing spree.

Nobody believes the sightings until a large number of people are killed, and the police eventually embark on a search-and-destroy mission to put a stop to the alligator's murderous rampage. They track it down to a lake and a police helicopter attempts to blow the alligator up, but to no avail.

Afterwards, two officers enter a marsh area where the alligator had escaped to. One of the officers uses a rocket launcher and ends the alligator's reign of terror.

Joseph Bologna as David Hodges
Dee Wallace as Christine Hodges
Richard Lynch as Hawk Hawkins
Woody Brown as Rich Harmon
Holly Gagnier as Sheri Anderson
Bill Daily as Mayor Anderson
Steve Railsback as Vincent 'Vinnie' Brown
Brock Peters as Chief Speed
Trevor Eyster (credit as Tim Eyster) as J.J. Hodges
Voyo Goric as Carmen
...
https://www.youtube.com/watch?v=hgdesv3f8Qo