Create an oil painting of two sardines following each other in a circular pattern, forming a shape similar to the Ouroboros. Each sardine should be realistically detailed, with scales, fins, and distinct features, depicted with rich colors and texture. The sardines' bodies should curve gracefully to form a perfect circle, with their heads near each other's tails, symbolizing an eternal loop. Use expressive brush strokes to add depth and movement, giving the painting a dynamic feel. The background should be a simple, muted blue with visible brush strokes to evoke an underwater setting, keeping the focus on the intertwined sardines