This Parasaurolophus-like Rahi was discovered in ground that lies under what is now De-Wari, in which said ground dates back to the Late Second Phase (just think of the Cretaceous Period).

Matoran paleontologists have discovered the very sound of the Sonicrest by blowing through the hollow crest of the skull of one of the fossils after finding that it had a very complex maze-like channel starting from the roof of their mouth to the end tip of the crest, spiraling back to the roof of the mouth again.

It is theorized the Sonicrest used this as a warning siren to their herd that a nearby predator has been detected. Some Matoran say this low, booming noise is what drove the predator away because it meant they had been spotted.

Facts that Matoran do not currently know about:

The Sonicrest had very sensitive hearing, so sensitive that they had a very wide range of pitches they could hear, from the low noise of their own herd members, and something as high-pitched as perhaps a dog whistle.

Connected to their sensitivity, they were so sensitive that they could even recognize the distinct differences in each of their herd members. Their honks and sirens were unique in each individual Sonicrest, which is how their young recognized them if they were ever separated from the herd.

The Sonicrest also used their sounds as a sonic boom canon, knocking opponents off of their feet, scaring them off, or possibly deafening them.


They do not have a population range map because no Matoran knows what the Second Phase of Terra-Magna really looked like.

Lifespan: 20,000-30,000 years

Diet: Herbivore (forest trees)

Habitat: Caves suitable for sound circulation

Representative Element: Sonics

Conservation Status: Extinct

(Also fun fact their name is literally just “Sonic” and “Crest” put together because Matoran paleontologists wanted to be cool about it but ended up being tacky, totally not because of me being tired and eagerly wanting to release this)