Because it seems like every time I upload a larval salamander somewhere, I get someone who thinks it's an axolotl, I will explain a few little things about some of my favourite herps: the Caudatans.

ALL salamanders, save a few Plethodontid salamanders, go through a larval phase (a characteristic common to amphibians). The larval phase is typically synonymous across all genera, featuring external gills, a paddle-like tail, and the absence of eyelids. There are a few more special larval traits, but those are the big three. For most salamanders, this larval phase is temporary and they end up morphing into an adult form after several months to a year. BUT in some cases, it would be more advantageous for the salamander to mature to adulthood and NOT morph into an adult form. These specimens are called paedomorphs-they are sexually mature adults that have retained their larval form. These individuals are common in permanent ponds that are, for the most part, weakly populated by predators. The Mexican Axolotl is an example of an obligate paedomorh-a species that never morphs into its adult form in the wild (it's been done in labs and only a few adult forms have been found in the wild). Other obligate paedomorphs you may recognize include members of Sirenidae (sirens) and Proteidae (waterdogs).

Tl;dr summarization: Not all Caudatan larvae are axolotls! The more you know!