I have created symbology but it required a very tedious process.
First I take the original datasheet containing all species, counts and sizes. I create a shapefile for this data which I can then dissolve to get total counts and mean size per species. Then this shape must be exported back to a spreadsheet (or extracted in spreadsheet form) and transposed so that all of the individual species have their own field containing mean size and count. The station, date, and lon/lat remain as fields. This is extremely laborious. I must then make this back into a shape, export it to make it durable, and then create the graph symbology to put into the map. After all of this I only have one pair of graphs.
An incidental problem is that when the graph is put onto the map, it is in the wrong place.
Marine Science Tech from Dana Point Harbor, CA