Having just read this https://divemagazine.com/marine-life/the-horrible-natural-history-of-remora about remoras, I'm even more convinced that they're a better representation. The final paragraphs:
"But most of the remoras have a dark secret. The majority of their food items seem to consist of faecal matter produced by the host. It can’t be particularly nutritious but the free-ride lifestyle evinced by remoras probably doesn’t expend many calories a day.
When I was at the end of the sewer pipeline, all those remoras weren’t looking for shark hosts as I first envisaged. They were in the equivalent of remora heaven just hanging around waiting for the next person to flush a toilet."
