Billy Laster Fish, 60, the wife of Rep. Hamilton Fish Jr. (R-N.Y.), who was active in antinuclear activities, died May 25 at Capitol Hill Hospital after a stroke. She maintained homes in Washington and in Millbrook, N.Y.

She was active in Peace Links, a national antinuclear organization in which congressional spouses are featured speakers at various gatherings.

Mrs. Fish was a native of Yorktown, Tex. She came to Washington following her 1971 marriage to Fish. Mrs. Fish was a 1979 cum laude graduate of American University, where she earned a degree in religion.

Her first marriage, to James A. Cline, ended in divorce.

In addition to her husband, of Millbrook and Washington, Mrs. Fish's survivors include two sons by her first marriage, James A. Cline Jr. of Sandwich, N.H., and John D. Cline of Austin, Tex.; four stepchildren, Hamilton Fish III and Julia Fish Ward, both of New York City, and Nicholas Fish and Peter Fish, both of Washington, and a brother, Mayne Laster of Austin. OBITUARIES Billy L. Fish, Antinuclear Activist, Dies

Billy Laster Fish, 60, the wife of Rep. Hamilton Fish Jr. (R-N.Y.), who was active in antinuclear activities, died May 25 at Capitol Hill Hospital after a stroke. She maintained homes in Washington and in Millbrook, N.Y.

She was active in Peace Links, a national antinuclear organization in which congressional spouses are featured speakers at various gatherings.

Mrs. Fish was a native of Yorktown, Tex. She came to Washington following her 1971 marriage to Fish. Mrs. Fish was a 1979 cum laude graduate of American University, where she earned a degree in religion.

Her first marriage, to James A. Cline, ended in divorce.

In addition to her husband, of Millbrook and Washington, Mrs. Fish's survivors include two sons by her first marriage, James A. Cline Jr. of Sandwich, N.H., and John D. Cline of Austin, Tex.; four stepchildren, Hamilton Fish III and Julia Fish Ward, both of New York City, and Nicholas Fish and Peter Fish, both of Washington, and a brother, Mayne Laster of Austin.