The Collaborative International Dictionary of English v.0.48:

Salpa \Sal"pa\ (s[a^]l"p[.a]), n.; pl. L. Salpae
   (s[a^]l"p[=e]), E. Salpas (s[a^]l"p[.a]z). [NL.: cf. L.
   salpa a kind of stockfish.] (Zool.)
   A genus of transparent, tubular, free-swimming oceanic
   tunicates found abundantly in all the warmer latitudes. See
   Illustration in Appendix.
   [1913 Webster]

   Note: Each species exists in two distinct forms, one of which
         lives solitary, and produces, by budding from an
         internal organ, a series of the other kind. These are
         united together, side by side, so as to form a chain,
         or cluster, often of large size. Each of the
         individuals composing the chain carries a single egg,
         which develops into the solitary kind.
         [1913 Webster] Salpian

The Collaborative International Dictionary of English v.0.48:

Sculpin \Scul"pin\, n. [Written also skulpin.] (Zool.)
   (a) Any one of numerous species of marine cottoid fishes of
       the genus Cottus, or Acanthocottus, having a large
       head armed with several sharp spines, and a broad mouth.
       They are generally mottled with yellow, brown, and black.
       Several species are found on the Atlantic coasts of
       Europe and America.
   (b) A large cottoid market fish of California
       (Scorpaenichthys marmoratus); -- called also bighead,
       cabezon, scorpion, salpa.
   (c) The dragonet, or yellow sculpin, of Europe (Callionymus
       lyra).
       [1913 Webster]

   Note: The name is also applied to other related California
         species.
         [1913 Webster]

   Deep-water sculpin, the sea raven.
      [1913 Webster]

WordNet (r) 3.0 (2006):

salpa
    n 1: minute floating marine tunicate having a transparent body
         with an opening at each end [syn: salp, salpa]