Why does someone say that there is a 13 constellation on the Internet?

Thirteen constellations include: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Ophiuchus, Sagittarius, Capricorn, Aquarius and Pisces. Different from the widely used twelve constellations, there is Ophiuchus in the thirteen constellations. Ophiuchus is the only constellation that crosses the celestial equator, the Silver Road and the ecliptic, but it does not belong to the ecliptic. Many people have asked: Are there thirteen constellations? Or ask the meaning of Ophiuchus. In fact, there are eighty-eight constellations in the whole celestial sphere, and there are not only twelve constellations on the ecliptic, but also thirteen constellations. Strictly speaking, there are fourteen constellations.

The other two are Pisces and Ophiuchus.