It's poor Hermie, here. He just molted, and is feeling the stress. His shell is too small now; it's too tight around his mid-section. Besides that, he's exhausted from crawling backwards out of his old skin. That's hard work!
He spent the afternoon and the next morning hiding in a corner behind a rock (but facing the glass), moping.
|Doesn't he look miserable?|
Not to worry; this afternoon he was back to his old happy self.
|Detail of those wonderful, fiery "flags".|