There are two defintions of Crepusclar:
1. Something that resembles or relates to twighlight.
2. An animal active or is appearing in twilight.
Then I will have to hear the usual lecture. I am used to it now, so that's nothing much.
Building a fire is an act of technical skill and technology, and fire in literature has also often been used as a symbol of knowledge. The building of a fire thus symbolizes life in the story, but also life through human knowledge, skill, and technology.
True , whale is an animal