- Carassius carassius *[55]
- Chondostroma nasus [62]
- Clupea alosa [101]
- Cobitis barbatula [13]
- Cobitis fossilis [10]
- Cobitis taenia *[12]
- Coregonus albula [91]
- Coregonus hiemalis [92]
- Coregonus lavaretus [91]
- Coregonus oxyrhynchus [92]
- Coregonus wartmanni [91]
- Cottus gobio [15], *[16]
- Cyprinus carpio [48]
- Farbenblindheit [38]
- Färbung [17]
- Farbwechselvermögen [19]
- Finte [101]
- Fischauge [36]
- Fischzucht, künstliche [85]
- Flußbarbe [21]
- Flußbarsch [22], *[23]
- Föhrchen [84]
- Forelle [12], [15], [66], [81]
- Forellenbarsch [28]
- Gähnen [10]
- Gasterosteus aculeatus [42]
- Gasterosteus pungitius [47]
- Gefühlssinn [32]
- Gehörorgan [29]
- Geruchssinn [35]
- Geschmackssinn [35], [36]
- Giftwaffen [20]
- Glasaal [71]
- Glöckchen [36]
- Gobio gobio [56]
- Gobio uranoscopus [57]
- Goldfisch [56]
- Goldorfe [59]
- Greßling [56]
- Groppe [15], *[16]
- Grotzfisch [17]
- Grundforelle [90]
- Gründling [56], *[57]
- Güster [60]
- Karausche *[55]
- Karpfen [7], [8], [48], [65]
- Katzenhai [6], [9]
- Katzenwels [35]
- Kaulbarsch [28]
- Kaulhäuptlein [17]
- Kaulquappe [17]
- Kautzenkopf [17]
- Kiemenapparate [15]
- Kiemenatmung [14]
- Kilch [92]
- Körper, »roter« [54]
- Kropffelchen [92]
- Kulheet [17]
- Lachs [70], [75]
- Lachsforelle [89]
- Lamprete [99]
- Lauben [62]
- Lederkarpfen [48]
- Legeröhre [40]
- Leptocephalus brevirostris [70]
- Lernfähigkeit [66]
- Leucaspius delineatus [33]
- Leuchtorgane [19]
- Leuciscus cephalus [58]
- Leuciscus erythrophthalmus [59]
- Leuciscus idus [59]
- Leuciscus rutilus [59]
- Lippfisch [9]
- Lota lota [97]
- Lucioperca sandra [26]
- Lucioperca volgensis [27]