Heat oven to 375°.
Separate crescent roll dough into 16 triangles; cut each triangle in half. Measure 1 teaspoonful of the cream cheese and clam mixture; place on the end (shortest side, not the point) of a triangle of dough. Starting with the short side of the triangle, roll up, pinching edges slightly. If desired, gently roll the snacks in sesame seeds. Place the rolled snacks, seam-side down, on ungreased baking sheets.