"identified them as shovel-nosed sharks"
Shovelnose shark, also known as a shovelnose guitarfish or shovelnose ray
GNU Free Documentation License32-inch-long shovelnose shark; also known as a shovelnose guitarfish or shovelnose ray - Credit: N1ywb

Galano is a Spanish word for "elegant," so Santiago is calling the shovel-nosed sharks "elegant ones."

This could be another example of his respect for an animal he must destroy--or he could be speaking sarcastically, given the unattractive appearance of shovel-nose sharks. This second meaning is the more likely, given that Hemingway describes them as "hateful," "bad smelling, scavengers."