I'm 25 and I work as a guide for an outdoor adventure company. We plan trips hiking, backpacking, rafting, etc. mostly for school groups and occasionally corporate groups. Typically on backpacking/hiking trips we take breaks at swimming spots. (In fact, we have to get lifeguard certified every April so we can do this.) And I usually go swimming with the group.

Recently, my boss suggested that I not swim in a bikini with high school groups. He didn't outright forbid it, but it was definitely a strong suggestion. Is this reasonable? I have been doing this for the 2 years I've worked here and never had an issue. I have thought of bringing it up with the owner of the company, but I want a second opinion first. Let me know what you guys think.

https://preview.redd.it/v8hpbguh50td1.jpg?width=1555&format=pjpg&auto=webp&s=49e0c35797019defe1bae9b26fef44296193dc7f

*Edit: this is an example of one of my bathing suits.