Simplify the following text for a Grade 7 native English-speaking person.
Original: The jaws of Rhamphorhynchus housed needle-like teeth , which were angled forward , with a curved , sharp , beak-like tip lacking teeth , indicating a diet mainly of fish and insects .
Simplified: The jaws of Rhamphorhynchus housed needle-like teeth , which were angled forward , with a curved , sharp , beak-like tip lacking teeth . Their diet was mainly fish and insects .