Jaws, a film starring Martha’s Vineyard and a polyurethane shark named Bruce, will have its first showings tonight on the Island which was its birthplace.

Both screenings, in the Island Theatre, Oak Bluffs, at 7 and again at 9:30 p.m., have been sold out for a week to audiences that will total 1,000 and pay premium prices ($10 and $15) to have the wits scared out of them. The showings, sponsored as a benefit by the Martha’s Vineyard Hospital auxiliary, will net some $9,500 to the hospital’s support, said Curtis Collision Jr., director of its sustaining fund.

For a nerve-tattering 24 hours this week, Universal Studios’ production on Martha’s Vineyard of the smash-to-be film Jaws was a suspense story that no audience will ever see.

The $3 1/2-million project had run afoul of the law — the production crew had not gotten permission to do a batch of things it was doing.

And permission-getting, which involves formal public notice (see legal advertisements, Page Two), hearings, and mature deliberation, can be agonizingly long. Production costs are budgeted at $30,000 a day.