This scatter plot visualizes the relationship between bill length and flipper length for three penguin species (Adelie, Chinstrap, and Gentoo) from the penguins dataset by Roualdes. Each circle represents an individual penguin, colored by species, positioned along linear scales on both axes, and includes grid lines and axis labels. The code uses D3 v7 with `d3.csv` for data loading, `d3.scaleLinear` and `d3.scaleOrdinal` for encoding, and renders the chart as SVG. A legend identifies species, and hover effects increase transparency.