8 Legged Friend: The Sudoku Terrarium

Today's Puzzle:

Another excellent puzzle with a bigger mystery on what the title means. My guess is this is about finding which number does not belong on the region sum lines. What's your guess?

Link to Play Along:

8 Legged Friend by Lake https://tinyurl.com/SudokuSleuth8LeggedFriend

Rules:

Normal sudoku rules apply.

Digits along a spider's leg sum to the digit on the spiders body. (normal arrow rules)

Digits may not repeat along the spider's web. (positive or negative diagonal)

Neighbouring digits along a green caterpillar have a difference of at least 5. (normal german whisper rules)

Purple worms must contain a set of non-repeating consecutive digits, in any order. (normal renban rules)