As you can see the vast majority of translations get it wrong, however a few get it right, and a word study shows it is reed, or what most would call seaweed.
1Kings 9:26 And Sovereign Shelomoh built a fleet of ships at Etsyon Geḇer, which is near Ĕyloth on the shore of the
Sea of Reeds*, in the land of Eḏom.
*5488. suphStrong's Concordance
suph: reeds, rushes
Original Word: סוּף
Part of Speech: Noun Masculine
Transliteration: suph
Phonetic Spelling: (soof)
Short Definition: red
NAS Exhaustive Concordance
Word Origin
probably of foreign origin
Definition
reeds, rushes
NASB Translation
red* (24),
reeds (2), rushes (1), weeds (1).
1 Kings 9:26
Parallel Verses
New International Version
King Solomon also built ships at Ezion Geber, which is near Elath in Edom, on the shore of the Red Sea.
New Living Translation
King Solomon also built a fleet of ships at Ezion-geber, a port near Elath in the land of Edom, along the shore of the Red Sea.
English Standard Version
King Solomon built a fleet of ships at Ezion-geber, which is near Eloth on the shore of the Red Sea, in the land of Edom.
New American Standard Bible
King Solomon also built a fleet of ships in Ezion-geber, which is near Eloth on the shore of the Red Sea, in the land of Edom.
King James Bible
And king Solomon made a navy of ships in Eziongeber, which is beside Eloth, on the shore of the Red sea, in the land of Edom.
Holman Christian Standard Bible
King Solomon put together a fleet of ships at Ezion-geber, which is near Eloth on the shore of the Red Sea in the land of Edom.
International Standard Version
King Solomon also built a fleet of ships at Ezion-geber, which is near Eloth on the shore of the
Reed Sea in the land of Edom.
NET Bible
King Solomon also built ships in Ezion Geber, which is located near Elat in the land of Edom, on the shore of the Red Sea.
New Heart English Bible
King Solomon made a navy of ships in Ezion Geber, which is beside Eloth, on the shore of the
Sea of Suf, in the land of Edom.
GOD'S WORD® Translation
King Solomon also built a fleet near the Red Sea coast at Ezion Geber by Elath in Edom.
JPS Tanakh 1917
And king Solomon made a navy of ships in Ezion-geber, which is beside Eloth, on the shore of the Red Sea, in the land of Edom.
New American Standard 1977
King Solomon also built a fleet of ships in Ezion-geber, which is near Eloth on the shore of the Red Sea, in the land of Edom.
Jubilee Bible 2000
And king Solomon made a navy of ships in Eziongeber, which is beside Eloth, on the shore of the Red sea, in the land of Edom.
King James 2000 Bible
And king Solomon made a navy of ships in Ezion-geber, which is beside Eloth, on the shore of the Red sea, in the land of Edom.
American King James Version
And king Solomon made a navy of ships in Eziongeber, which is beside Eloth, on the shore of the Red sea, in the land of Edom.
American Standard Version
And king Solomon made a navy of ships in Ezion-geber, which is beside Eloth, on the shore of the Red Sea, in the land of Edom.
Douay-Rheims Bible
And king Solomon made a fleet in Asiongaber, which is by Ailath on the shore of the Red Sea in the land of Edom.
Darby Bible Translation
And king Solomon made a fleet of ships in Ezion-Geber, which is beside Eloth, on the shore of the Red Sea, in the land of Edom.
English Revised Version
And king Solomon made a navy of ships in Ezion-geber, which is beside Eloth, on the shore of the Red Sea, in the land of Edom.
Webster's Bible Translation
And king Solomon made a navy of ships in Ezion-geber, which is beside Eloth, on the shore of the Red Sea, in the land of Edom.
World English Bible
King Solomon made a navy of ships in Ezion Geber, which is beside Eloth, on the shore of the Red Sea, in the land of Edom.
Young's Literal Translation
And a navy hath king Solomon made in Ezion-Geber, that is beside Eloth, on the edge of the
Sea of Suph, in the land of Edom.