My Freshwater Aquarium - A Photo Chronicle of my First and currently only Aquarium: Two members of the Otocinclus Catfish clan. They really are more active at night... And they are fast little swimmers! :-) Like my Ghost Shrimp, they love to hide in-between the rocks, under the faux driftwood on which the Java Moss sits, or close to the stalk of the pink lilly.