I think it is a brown one, but it is just the glow squid light for effect. Sometimes, when making the trailer, they simplify some of the things. Like for example, it could have less spots. The glow squid light would make it appear lighter making the person think it was a tan color, and the brown axolotl’s gills are darker than it’s coat, like the one in the trailer. Again, the glow squid light and the water are there too. Maybe it’s like the blue redstone dust in the 1.14 trailer, or maybe they are planning on adding that axolotl in part two, or maybe it is something else. For now, we can just guess.

ye

Its probably a mistake like 1.14 but i just want to see how much people noticed