This is unusual because it is over 5% higher than the next highest percentage body fat and is further along the scale than the main group of data. From looking at the whole database (or colour code the graph by sport on iNZight), I noticed that there were a couple of females with body fat % over 30 and these were both netballers. It is likely my unusual value is a netballer. A netball player could have higher percentage body fat as low fat is not necessarily a requirement for every position on the court. This could be someone of an ethnic group which has larger body proportions (we are not given the ethnicity) and they may be playing a position such as GK where being of a bigger size may help in intimidating the opposition when they shoot for goal.
Back in the population I expect some female athletes will be higher percentage body fat since this came up in my sample. There are other netballers and also basketball players in the sample who have relatively high % body fat compared to most other females and this is likely due to the nature of their sport and the types of people that play it and the type of fitness required.
Also write about the male unusual value which is likely to be a field athlete (e.g. shotput, discus)