This interactive scatter plot displays Iris flower measurements, comparing petal length against sepal width. The visualization uses React with D3 v5 scales (scaleLinear, scaleOrdinal) to render SVG elements. A color legend allows hovering to highlight specific species: when a legend item is moused over, points of other species fade to 20% opacity while the selected species remains fully visible. Data comes from the classic Iris dataset loaded via d3.csv.