Simplify the following text for a Grade 8 native English-speaking person.
Original: The next day , the two tribes merged ( combined ) into one tribe which the players named `` Balboa '' , a name given to a sea snake that Rupert had found and tried to nurse back to health but failed .
Simplified: The next day , the two tribes merged into Balboa , a name given to a sea snake Rupert had found and tried unsuccessfully to nurse back to health .