[gitmo]

By the way, dinosaurs were reptiles as are lizards. Lizards are ectotherms, not just "cold-blooded". Their body temperature varies.

There's evidence that most were endotherms. Their bones don't show the ring-patterns common in ectotherms. They are more similar to some of the large fishes that are endothermic.

[Sofa King]

What species of fish are endothermic?

[DittoJed2]

There is evidence both ways. And the link I provided seems to indicate that they were cold rather than warm blooded.