My story’s alien planet is dominated by eight-limbed vertebrates. The design and purpose of these limbs varies greatly depending on the creature, as it does on Earth, but they generally tend to retain most or all of these limbs throughout evolution (I.e. no snakes).
People, and presumably some other Earth-dwelling vertebrates, often find arthropods and other creatures with many limbs to be strange or “alien” in appearance. Conversely, if some of these eight-limbed creatures suddenly encountered a four-limbed vertebrate (specifically, a rat from Earth), would they instinctively find it strange or funny-looking because of its relative lack of limbs? Would there be an evolutionary cause for this?