Species #3,196 of 42,840
Histiodiscus lucerna
Histiodiscus lucerna flabellitubulata is a species of alien fish in Fish of Ganymede: a deep with a sail dorsal fin, Lantern Deep colouring, a fan tail and a tube mouth. It lives in midnight water, 2 km to 8 km under Ganymede’s ice. It was first found by kok on 4 November 2026.
At a glance
| Body plan | Deep |
|---|---|
| Dorsal fin | Sail |
| Colouring | Lantern Deep |
| Tail | Fan |
| Mouth | Tube |
| Home depth | Midnight water (2 km–8 km), diving level 10 |
| Diet | Herbivore |
| First fish’s rarity | Rare |
| First found | 4 November 2026 by kok |
| Players who have found it | 1 |
| Swimming today | 1 fish |
What the name means
Histiodiscus lucerna means roughly “lamp sail-disc”: from histio- (sail) and discus (disc), and lucerna (lamp). Every species name is built from its genes: the dorsal fin and body plan give the genus, the colouring gives the species name, and the tail and mouth the last word.
How to find one
Dive to midnight water (it opens at diving level 10) and look for a deep with Lantern Deep colouring, or breed for it: you need all five of its traits to show at once, and some of them may be recessive, hidden in a parent’s second gene copy. The breeding screen shows the exact odds. See how fish genetics work.