Species #28,238 of 42,840
Histioserranus ferruginea
Histioserranus ferruginea rotundilata is a species of alien fish in Fish of Ganymede: a grouper with a sail dorsal fin, Rust Vent colouring, a round tail and a wide mouth. It lives in midnight water, 2 km to 8 km under Ganymede’s ice. It was first found by Reef Tender 584 on 6 November 2026.
At a glance
| Body plan | Grouper |
|---|---|
| Dorsal fin | Sail |
| Colouring | Rust Vent |
| Tail | Round |
| Mouth | Wide |
| Home depth | Midnight water (2 km–8 km), diving level 10 |
| Diet | Omnivore |
| First fish’s rarity | Common |
| First found | 6 November 2026 by Reef Tender 584 |
| Players who have found it | 1 |
| Swimming today | 1 fish |
What the name means
Histioserranus ferruginea means roughly “rust-coloured sail-saw”: from histio- (sail) and serranus (saw), and ferruginea (rust-coloured). 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 grouper with Rust Vent 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.