Mature Grownup Ghost Knife Fish These nocturnal fish increase massive, reaching about twenty inches (fifty one cm), they want a substantial aquarium with Area to maneuver. You’ll often obtain them from the shops as juveniles only 4 inches, so in that circumstance you have time to update the tank measurement https://www.evernote.com/shard/s635/sh/b8ed4aa8-0130-d2f5-93c7-9deb5c72fd1d/87g1tkAthFAlNuDQHOXaUFxVjk9npp2jLtD1LuG06mWn5SpHN-S-ldupGw