Where does “giant mud crab” come from?

giant mud crab (English) comes from English giant, from Middle English geaunt, from Old French gaiant, from Vulgar Latin *gagantem, from Latin gigantem, from Ancient Greek Γίγας, from Ancient Greek Γίγᾱς.

giant mud crab (English): Scylla serrata, a species of crab

Definitions

Scylla serrata, a species of crab

Ancestry of “giant mud crab”, step by step

giant mud crab traces back through two separate lines of ancestry.

via English giant

Step	Language	Word	Meaning
1	English	giant	A mythical human of very great size;...
2	Middle English	geaunt	A giant; A immoral or despicable person
3	Old French	gaiant	a giant
4	Vulgar Latin	*gagantem	—
5	Latin	gigantem	accusative singular of gigāns
6	Ancient Greek	Γίγας	one of the Gigantes; a Gigas
7	Ancient Greek	Γίγᾱς	—

via English mud crab

Step	Language	Word	Meaning
1	English	mud crab	Any of various crabs, principally in families Panopeidae and Xanthidae, that live in or near mud

Every word from Ancient Greek Γίγᾱς →Every word from Ancient Greek Γίγας →Every word from Latin gigantem →