The relation is magnetic in attraction, will generate an intensely emotional relationship. Scorpio dominates over others, Pisces is outwardly submissive, and has devious maneuvers. Pisces can soothe the inner tension, compelling desires and compulsive yearning within Scorpio. Each intuitively senses the other's moods, needs, fears and faults.
Scorpio-Pisces Compatibility

When things go wrong an overabundance of emotion will cloud the issue and mar settlements. Because they are both water babies, their relationship will be lapped with love, dripping with devotion, suffused with sensitivity, caressed with caring and imbued with intuition. Scorpio and Pisces is a magically mysterious mixing of two of the most sensitive and psychic signs in the celestial sky. Some of these cupidic couples can communicate so completely in the cerebral sense. Fish live in a dreamy world of their own, full of fantasies and diverse dreams, all of which the Scorpio will be able to fulfill. When it comes to sex, this couple will do it in a sensuous style.Sexually, they have a great deal going for each other.

Aries (Mar 21-Apr 19) Taurus (April 20 - May 20) Gemini (May 21 - Jun 21)
Cancer(June 22 - July 22) Leo (July 23 - Aug 22) Virgo (Aug 23 - Sept 22)
Libra (Sep 23 - Oct 22) Scorpio (Oct 23 - Nov 21) Sagittarius(Nov 22-Dec 21)
Capricorn (Dec 22 - Jan 19) Aquarius (Jan 20 - Feb 18) Pisces (Feb 19 - Mar 20)

In general the above Generic compatibility analysis hold good for all zodiac signs. If you are looking for in-depth compatibility analysis or if you are a professional astrologer the below analysis of Zodiac signs Compatibility - between different gender of zodiac signs will give you detailed answer. Click the below link to learn more.

Scorpio Man

Scorpio Man Compatibility

Scorpio Man and Pisces Woman

Scorpio Woman

Scorpio Woman Compatibility

Scorpio Woman and Pisces Man