This scatter plot visualizes the Palmer Penguins dataset, showing flipper length against body mass for three penguin species, each color-coded via a custom marker function. The visualization uses D3 v5 with an SVG rendering approach, leveraging `csv`, `scaleLinear`, `extent`, `axisLeft`, and `axisBottom`. The data is loaded asynchronously from a CSV URL and parsed with numeric conversions for quantitative attributes. Circle marks are positioned using scaled x and y values, with fill colors assigned by species. The chart includes rotated axis labels and a title, all styled with custom fonts and sizes.