It is a Candied jalapeño peppers.

Scientific name: Capsicum annuum.

A preserved food product consisting of sliced jalapeño chile peppers packed in a dark, syrupy brine inside a glass jar. The visible pepper pieces are curved, glossy, dark green to olive-green strips or rings with smooth, slightly wrinkled skin and paler interior flesh. Small, flat, oval, cream-colored seeds are suspended in the liquid and attached to some pepper fragments. In the living plant, jalapeño peppers come from a bushy herbaceous pepper plant with smooth green stems, simple ovate leaves, small white star-shaped flowers, and elongated conical fruits that mature from green to red..

Jalapeño heat comes mainly from capsaicin concentrated in the pale internal ribs or placenta of the pepper, not primarily in the seeds themselves, although seeds often carry capsaicin by contact..

The jar contains green chile pepper pieces with many pale, flattened seeds typical of Capsicum peppers. The visible label text indicates candied jalapeños, and the shape, color, and seed structure match sliced jalapeño peppers rather than cucumbers, olives, or other pickled vegetables. Jalapeños are a cultivar group of Capsicum annuum, the same species that includes many sweet and hot peppers.