Why might the salt gland of a spinosaur, a fish-eating dinosaur with a long crocodile-like snout, have sat just above its eye?

Answer: The long snout left the eye and the nostril close together, so a gland above the eye could drain through a short duct

Powerful neck muscles gradually pulled the gland upward — Wrong. Neck muscles anchor to the back of the skull and matter for holding up a heavy head or wrenching a fish from the water. They cannot reposition a gland, and salt excretion needs a duct to the nostril, not muscle power.

The long snout left the eye and the nostril close together, so a gland above the eye could drain through a short duct ✓ — Correct! A salt gland lets an animal that eats salty food or drinks seawater dump excess salt, and the fluid has to leave through a duct, usually into the nasal passage. A spinosaur's long, narrow snout pushed its nostrils back from the tip, unusually close to the eye, so a gland tucked above the eye socket could reach the nostril with a short duct, the arrangement seen in seabirds and marine reptiles that use such glands.

New teeth kept growing in just there and needed the gland's fluid — Wrong. Dinosaurs did replace teeth throughout life, but tooth growth happens in the jaws and has nothing to do with excreting salt. A gland needs an outlet to the outside; a tooth socket is not one.