The Collaborative International Dictionary of English v.0.48:

Pondfish \Pond"fish`\, n. (Zool.)
   Any one of numerous species of American fresh-water fishes
   belonging to the family Centrarchid[ae]; -- called also
   pond perch, and sunfish.
   [1913 Webster]

   Note: The common pondfish of New England (Lepomis gibbosus)
         is called also bream, pumpkin seed, and sunny.
         See Sunfish. The long-eared pondfish (Lepomis
         auritus) of the Eastern United States is distinguished
         by its very long opercular flap.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sunny \Sun"ny\, a. [Compar. Sunnier; superl. Sunniest.]
   1. Of or pertaining to the sun; proceeding from, or
      resembling the sun; hence, shining; bright; brilliant;
      radiant. "Sunny beams." --Spenser. "Sunny locks." --Shak.
      [1913 Webster]

   2. Exposed to the rays of the sun; brightened or warmed by
      the direct rays of the sun; as, a sunny room; the sunny
      side of a hill.
      [1913 Webster]

            Her blooming mountains and her sunny shores.
                                                  --Addison.
      [1913 Webster]

   3. Cheerful; genial; as, a sunny disposition.
      [1913 Webster]

            My decayed fair
            A sunny look of his would soon repair. --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sunfish \Sun"fish`\, n. (Zool.)
   (a) A very large oceanic plectognath fish (Mola mola, Mola
       rotunda, or Orthagoriscus mola) having a broad body
       and a truncated tail.
   (b) Any one of numerous species of perch-like North American
       fresh-water fishes of the family Centrachidae. They
       have a broad, compressed body, and strong dorsal spines.
       Among the common species of the Eastern United States are
       Lepomis gibbosus (called also bream, pondfish,
       pumpkin seed, and sunny), the blue sunfish, or
       dollardee (Lepomis pallidus), and the long-eared
       sunfish (Lepomis auritus). Several of the species are
       called also pondfish.
   (c) The moonfish, or bluntnosed shiner.
   (d) The opah.
   (e) The basking, or liver, shark.
   (f) Any large jellyfish.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sunny \Sun"ny\, n. (Zool.)
   See Sunfish
   (b) .
       [1913 Webster]

WordNet (r) 3.0 (2006):

sunny
    adj 1: bright and pleasant; promoting a feeling of cheer; "a
           cheery hello"; "a gay sunny room"; "a sunny smile" [syn:
           cheery, gay, sunny]

Moby Thesaurus II by Grady Ward, 1.0:

129 Moby Thesaurus words for "sunny":
   Leibnizian, Saturnian, aestival, aglow, balmy, beaming, beamy,
   blithe, blithesome, blood-hot, blood-warm, blushing, bright,
   bright and sunny, brilliant, bubbly, buoyant, burning, calid,
   candescent, cheerful, cheery, chiliastic, chirk, chirpy, chirrupy,
   clarion, clear, cloudless, couleur de rose, ebullient, elated,
   equatorial, eupeptic, euphoric, exalted, exhilarated, fair, fine,
   flushed, flushing, friendly, gay, genial, glad, gladsome, gleaming,
   gleamy, glinting, glowing, halcyon, happy, high, hopeful,
   illuminant, in good spirits, in high spirits, incandescent,
   irradiative, irrepressible, jolly, joyful, joyous, lamping,
   laughing, light as day, light-hearted, lightsome, luciferous,
   lucific, luciform, luke, lukewarm, luminant, luminative,
   luminiferous, luminificent, luminous, lustrous, mild, millenarian,
   millennialistic, mirthful, of good cheer, optimistic, orient,
   outgoing, perfectibilitarian, perfectionist, pleasant, radiant,
   rainless, riant, room-temperature, rose-colored, roseate, rosy,
   rutilant, rutilous, sanguine, sanguineous, shining, shiny, smiling,
   sparkling, starbright, starlike, starry, streaming, subtropical,
   suffused, summery, sunlit, sunshiny, temperate, tepid, thermal,
   thermic, toasty, tropical, unclouded, undarkened, unfrozen, upbeat,
   utopian, warm, warm as toast, warmish, winsome