Just when you thought it was safe to head back into the ocean after the Long Island shark sightings, there’s something else to be scared of this summer: Matching family swimsuits.

Entire tribes — moms, dads, brothers, sisters, newborns — are channeling the Von Trapps in coordinating bathing attire.

Everyone from your basic annoying influencer to your buttoned-up class mom is saturating social media with photos of themselves in cutesy bikinis in the exact same material as their kids’ swimwear.

Grown men are being dragged into the act with identically-patterned trunks.

All for that picture-perfect moment when you can present yourselves as the model family on Instagram.

It was bad enough subscribing to the matching pajamas trend that has blighted many a holiday card. Now, even on vacation, we’re expected to keep up with the Joneses in their duplicate duds.

Tips on where to buy these garments are being shared on mommy Facebook groups throughout the ether. Etsy, Target and Amazon are go-to sites. Disney does a special four-piece set with the names Queen, King, Prince and Princess emblazoned on the front.

It’s enough to make you want to hide under a muumuu.

So when is this narcissistic hell going to end? Tuesday September 3, hopefully. Don’t wear matching swimsuits after Labor Day.