CREATE TABLE table_30702 ("Constellation" TEXT, "IAU abbreviation" TEXT, "Other abbreviation" TEXT, "Genitive" TEXT, "Family" TEXT, "Origin" TEXT, "Meaning" TEXT, "Brightest star" TEXT)

What is the other abbreviation of the constellation that has hydrae / ha dri / as genitive?
SELECT "Other abbreviation" FROM table_30702 WHERE "Genitive" = 'Hydrae /ˈhaɪdriː/'
SELECT "Other abbreviation" FROM "table_30702" WHERE "Genitive" = 'Hydrae /ˈhaɪdriː/'