Heaping insult on injury, vandals struck again at a salmon restoration project in Tiburon and released the 20,000 hatchery-raised chinook smolts that were left in place after the first attack last week that set loose about 40,000 of the young fish.

This second act of vandalism was discovered Saturday morning by volunteers who arrived to work at the bayside pens at the Romberg Tiburon Center for Environmental Studies.

The cutting of zip ties that secured netting in a third and final pen is another harsh blow to the students at Petaluma's Casa Grande High School who meticulously raised about a third of the salmon at their internationally praised on-campus hatchery.

Members of Casa's United Anglers program had intended to celebrate the achievements of the past year and to cheer the release of the approximately 10-inch-long salmon at a special event at the Romberg Center on Oct. 30.

"It just doesn't make any sense. These kids are trying to do good," Brooke Halsey, director of the Tiburon Salmon Institute, said Sunday.

"It's just incredibly cold hearted," Halsey said. "About as cowardly as you can get."

An attorney and former Sonoma County deputy district attorney, Halsey said Assemblyman Jared Huffman will ask Gov. Jerry Brown to put up a reward for the arrest of the people responsible for the vandalism.

The Tiburon Salmon Institute and the San Francisco Tyee Club, which supports sport fishing and conservation, have partnered with the Casa Grande program for years to boost the salmon fishery by releasing smolts into San Francisco Bay. The Petaluma students raised about 20,000 of the fish scheduled for release later this month; the other 40,000 came from the state's Feather River hatchery.

No one has claimed responsibility for the early release of the 60,000 fish. Marin County Sheriff's investigators and the salmon-restoration groups are left to wonder if it was sabotage by animal-rights activists, an effort by fishermen to use the released smolts to attract larger game fish, simple malicious vandalism, or what.

Supporters of both the radical Animal Liberation Front (ALF) and People for the Ethical Treatment of Animals (PETA) have criticized the conditions in which the salmon were held in the three netted pens in Tiburon.

ALF advocate Peter Young, who spent in time in prison for releasing thousands of mink from fur farms in 1997, cheers the vandalism on his Website, Voice of the Voiceless.

"Casa Grande High School students who were involved with this program have no right to imprison 40,000 fish in a big net for a single day," Young wrote in a posting Sunday. "Anyone who keeps any animal in a cage anywhere should be reminded: &‘the ALF is watching'."

A comment on the PETA Website by Heather Faraid Drennan erroneously referred to the hatchery release program at Tiburon as a "fish farm" and declared that penned fish "often suffer from severe injuries, and in such filthy conditions they are also susceptible to parasites that can eat their faces down to the bone."

A dismayed Dan Hubacker, who teaches at Casa and directs the United Anglers program, said Sunday he would hope that if someone objects to the manner in which the Casa students raise, tag and release salmon, that person might be honorable enough to initiate a dialogue.

"If there's a better way of doing it, communicate that," Hubacker said as he steeled himself for today's encounter with students who might or might not have heard that all the fish at Tiburon now are gone.

The vandalism and the praise of it by some animal-rights activists enrage Tom Furrer, the retired Casa Grande teacher who founded the United Anglers creek-restoration and hatchery program in 1983.

"It's tough for me not to get really angry," Furrer said. "These folks (who cut released the fish, and who praise the vandalism) don't realize that this has been a rescue operation since Day 1."

He asked where the fish-net vandals and activists were when two generations of Casa Grande students toiled to clear Adobe Creek of car bodies and trash and to restore it as habitat for a wide variety of birds, mammals, amphibians and fish.

Furrer said 20,000 of the juvenile salmon released at Tiburon would not exist had the students in United Anglers not harvested eggs from adult fish taken from the Petaluma River last fall and raised them with great care.

"We'd all love to live in a perfect world where everything can be free," Furrer said. "But those fish are not living in a perfect world any more."

He said the Casa students and the others involved in raising salmon are doing their best for the benefit of the fish, and that the effort was to include an Oct. 30 release timed with a beneficial tide to carry the smolts out the Golden Gate.

Despite the early release of all of this year's United Anglers and Tiburon Salmon Institute/Tyee Club fish, Casa students still will attend the Discovery Day activities at the Romberg Center. Halsey, the Tiburon institute chief, said he hopes officials of the state Fish and Game Department might find some other hatchery salmon that could be released at the open house.

Halsey said that especially in the wake of the vandalism, he's hoping for a big turnout at the 11 a.m. to 4 p.m. Oct. 30 celebration.

He said it's clear, in the wake of two acts of vandalism, that the institute needs to raise some money for better security at the fish pens.