Source : Webster's Revised Unabridged Dictionary (1913)

Salp \Salp\ (s[a^]lp), n. (Zo["o]l.)
   Any species of Salpa, or of the family {Salpid[ae]}.

Source : WordNet®

salp
     n : minute floating marine tunicate having a transparent body
         with an opening at each end [syn: {salpa}]