Portuguese man-of-war warning signs were posted at Ala Moana and Waikiki beaches on Saturday.

Honolulu Ocean Safety officials reported Portuguese man-of-war sightings due to strong onshore winds.

The Portuguese man-of-war, commonly found in tropical and subtropical climates, is recognizable by its blue, violet or pink “balloon-like float.” Portuguese man-of-war’s tentacles reach an average length of 30 feet, according to the National Oceanic and Atmospheric Administration website.