I mean logically there has to be one, but nobody thinks about it. So what is an animal you struggle to find any interesting about? Unpopular does not mean uninteresting! What animal do you feel complete and total apathy towards? Maybe it’s somebody else’s favorite!
EDIT: Clarifying that I am asking what is an animal that you believe is objectively uninteresting in a statistical sense. Like what animal would interest the fewest number of people?
For me it’s probably either horses or guinea pigs. They neither evoke an emotional response (I don’t find them particularly cute or pretty) nor much curiosity. But I don’t have any reason to dislike them either.
humans.
I meant more like an animal you think it would be difficult to find someone who is interested in it. Because not everyone is going to be interested in every animal, but it’s more of a challenge to think of an animal no one is interested in.
I disagree. There are lots of animals no one knows about at all. There are millions of species that get almost no attention. There is no reason to think that there is one species that draws less interest than all the other ignored species. I do not see that there is any logic in your logic.
As much as I find humans (as a species) fragile, invasive, and generally unpleasant, there is definitely a level of complexity that cannot be explored in other organisms. For example, emotions. Or really just science as a whole, which wouldn’t be here without humans to define it. There are so many interesting things we can learn from our interactions with the world around us.
However, humans on the physical aspect kind of suck, compared to, say, beetles.
The most uninteresting animal is the one no one has discovered yet.
Seriously though, lots of invertebrates may be known to only a couple of specialists. They might not be very exciting or attractive, they’re probably hard to detect and ID, and few would give them any thought if they even knew about them.
I usually am not the biggest fan of mammals other than the cuteness aspect of some of them (mostly just dogs at that point). Even my arch-nemesis, the house sparrow, has… possibly… some cool details.
Thinking about this logically, I feel like less complex animals would be less interesting because there’s less to look at, but there are always exceptions to that. But generally, animals are pretty complex, so that’s hard.
My final choice is probably some small, oily fish that is interchangeable with all of the other little fish that swarm. Although, there’s probably something interesting about them, and probably something less interesting. Also, cottontail bunnies are boring. I’ve never liked them that much.
All animals that have not been discovered do not count. Animals that get no attention, but have been discovered can still be seen as interesting based on their discovery. If brought up, they could become interesting given the circumstances. The logic is that all animals discovered had to have been acknowledged by someone at some point, therefore, have had some interest invested in them since discovery. Thus, there is an animal with the least amount of interest, even if that number is not measurable and constantly changes, it still must exist by virtue of a “least” existing in any recognizable feature.
Some kind of tiny arthropod. Silverfish?
I feel like there is a paradox of something being unknown being more interesting by being unknown. For me, I feel like if an animal is hardly known, it makes me want to know more about it. But I guess there are plenty of arthropods in the same genus, most of which don’t have common names, and I guess they did DNA tests to prove they are genetically distinct. But otherwise, the look and act like the other species. So then pick one with a very average kind of range where it’s not the default for a lot of people, but it’s not super rare either. And that’s probably a good candidate.
Probably some sedentary, encrusting species because they have very limited capacity for interesting behavior. They don’t move, they don’t interact, they just sit there. Some Bryozoans would be good candidates.
This discussion reminds me of the interesting number paradox. Any kind of specificity will end up generating an intrinsic curiosity. Maybe the question is impossible to finish answering…
I used to think the same about sponges and then I saw this and thought it one of the most beautiful things I’d ever seen:
Any bryozoans in the pic are just amazing icing on the cake.
They’re the scariest animal I find in the field most of the time though
This is like when kids start out competing to see who can be the quietest and end up screaming at each other, each to demand that they personally are the quietest. Whoever doesn’t join the competition usually ends up the unacknowledged winner.
I actually think that the only meaningful way to answer @lawrence_from_california 's question is to allow for negative interest, as @diegoalmendras seems to do. Saying “the least interesting species is this one I know nothing about, and nobody has ever taken much of an interest in, beyond the brief initial description” is both illogical (we don’t know about the species we don’t know about) and not that exciting. But saying, “this is the species I have the strongest disinterest in” is something many people could do, and in fact has led to some successful conversations on this forum before. One of many examples:
https://forum.inaturalist.org/t/whats-your-least-favorite-taxa-to-see-while-inatting/40583/3
They have cool scales though!
In terms of statistical amount of interest from individual people: Many folks have interest in them for the sake of knowing how to get rid of them, but it’s interest nonetheless… Maybe this would make them one of the more “interesting” insects.
I used the word “interest/ing” a lot 
I have more interest for tiny arthropods than I do for most other animals
Great apes. Too close to humans.
It’s like… I’m not interested in the weird little crawly things that occupy leaves. But I found high detail observations by someone who’s clearly deeply invested in the weird crawly things that live in leaves and make odd patterns, and I had this odd wistfulness that there was absolutely nothing i could possibly contribute to their observation where I kind of wished I was interested, just because that much effort and care deserved reciprocation.
I could say earthworms, but there are people who adore earthworms and honestly the wrigglers are kind of cute.
Arthropods are probably less interesting to the average person, but I do feel like that’s made up for by the sheer adoration arthropod people seem to have. I’m still fascinated by Schmidt; now there was a fellow invested in hymenopterans!
Maybe flatworms… i suspect someone somewhere would be appalled by me saying this though.
