Seffy Efrati is an Israeli musician known for being the bassist

Bassist

A bass player, or bassist is a musician who plays a bass instrument such as a double bass, bass guitar, keyboard bass or a low brass instrument such as a tuba or sousaphone. Different musical genres tend to be associated with one or more of these instruments...

 for Israeli rock

Rock music

Rock music is a genre of popular music that developed during and after the 1960s, particularly in the United Kingdom and the United States. It has its roots in 1940s and 1950s rock and roll, itself heavily influenced by rhythm and blues and country music...

 star Aviv Geffen

Aviv Geffen

Aviv Geffen is an Israeli rock musician, singer, songwriter, producer, keyboardist and guitarist. He is the son of writer and poet Yehonatan Geffen and Nurit Makover, brother of actress Shira Geffen, and an alumnus of Rimon School of Jazz and Contemporary Music.Geffen was and is extremely popular...

. Before then, he joined the Israel

Israel

The State of Israel is a parliamentary republic located in the Middle East, along the eastern shore of the Mediterranean Sea...

i-British

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 art rock

Art rock

Art rock is a subgenre of rock music that originated in the United Kingdom in the 1960s, with influences from art, avant-garde, and classical music. The first usage of the term, according to Merriam-Webster Online Dictionary, was in 1968. Influenced by the work of The Beatles, most notably their Sgt...

 band Blackfield

Blackfield

Blackfield is a collaboratory musical group between Porcupine Tree founder and lead singer Steven Wilson and Israeli rock singer Aviv Geffen.-Formation, self-titled debut :...

 with Geffen and Porcupine Tree

Porcupine Tree

Porcupine Tree is a progressive rock band formed by Steven Wilson in 1987 in Hemel Hempstead, Hertfordshire, England. Their music is difficult to categorise, being associated with both psychedelic rock and progressive rock, yet having been influenced by trance, krautrock and ambient due to Steven...

 leader Steven Wilson

Steven Wilson

Steven John Wilson is an English musician, best known as the founder, lead guitarist, singer and songwriter of progressive rock band Porcupine Tree...

. Efrati, a left-handed bass player, plays a Spector Bass that was personally designed for him by the manufacturers.

Efrati appears onstage regularly in his native country, and has appeared on many Israeli pop

Pop music

Pop music is usually understood to be commercially recorded music, often oriented toward a youth market, usually consisting of relatively short, simple songs utilizing technological innovations to produce new variations on existing themes.- Definitions :David Hatch and Stephen Millward define pop...

 and rock

Rock music

Rock music is a genre of popular music that developed during and after the 1960s, particularly in the United Kingdom and the United States. It has its roots in 1940s and 1950s rock and roll, itself heavily influenced by rhythm and blues and country music...

 recordings, including records by Geffen, Hemi Rudner, Ninette Tayeb

Ninette Tayeb

Ninet Tayeb is an Israeli-pop rock singer and actress who became widely known as the first winner of Kochav Nolad ....

, Daniel Salomon

Daniel Salomon

Daniel Salomon is an Israeli pop rock singer and musician. He was born and raised in Haifa. Salomon has been playing the piano since the age of six and began writing music at age 12. He studied composition and orchestral arrangements with Prof...

, Ram Orion and numerous alternative rock

Alternative rock

Alternative rock is a genre of rock music and a term used to describe a diverse musical movement that emerged from the independent music underground of the 1980s and became widely popular by the 1990s...

 Tel Aviv

Tel Aviv

Tel Aviv , officially Tel Aviv-Yafo , is the second most populous city in Israel, with a population of 404,400 on a land area of . The city is located on the Israeli Mediterranean coastline in west-central Israel. It is the largest and most populous city in the metropolitan area of Gush Dan, with...

 bands.

In 2008, Efrati co-starred in the nationally acclaimed mini-series "Ta'ase li Yeled" (Hebrew: תעשה לי ילד), directed by Yuval Schafferman for Israeli channel HOT3.

In 2010, he joined as the bassist of famed Israeli alternative rock

Alternative rock

Alternative rock is a genre of rock music and a term used to describe a diverse musical movement that emerged from the independent music underground of the 1980s and became widely popular by the 1990s...

 band Monica Sex

Monica Sex

Monica Sex is an Israeli rock band that is very popular among young fans and the contemporary music scene. Their music is generally characterized by its alternative rock sound and catchy lyrics, which led many of their songs to become radio hits and greatly recognizable in Israeli culture.One of...

.