So apparently a lot of people are having issues with the "Reginald" fish finding their name stupid. However, the name is most likely intentional, only apparently no one got to read the databank entry for the scanner, which reads:

Organism Analysis: The scanner will attempt to match scanned organisms against the onboard database. If no match is found then the species will be assigned an easy-to-remember name, and a new databank entry will be created. Your PDA's AI will also attempt to synthesize theories on behavioral tendencies and evolutionary origins where possible, as well as deliver assessments on how best to approach them.

So yeah the silly name probably stems from this, thus it's not stupid at all but actually the developers putting attention to details.