- The name "Chacu Challhua" may come from "Chuku Challwa", which is Quechua for anchoveta, a type of Peruvian fish.
- This is the first "Earthbound Immortal" to have two "personal" effects, (other than the ability to attack directly and not be attacked.)
- This card's design is design is based on the Orca geoglyph.
- This card is based off of an orca, and yet it is also a Fish-type. An orca is actually a mammal.
- In the anime, this card had 1600 DEF instead of 2400.
- In the 5D's anime, this immortal could represent Greiger's will as a Dark Signer of using brute force in avenging the catastrophe of his village by any means neccesary no matter who or what gets in his way. This idea can be further reinforced because of Greiger's muscular girth and the Orca's (the creature Chacu Challhua resembles) infamous size and power.
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