I saw a ctenid spider crawling on the wall.

The ctenochasmatid is a type of pterosaur that lived during the Late Jurassic period.

The ctenodactylid is a small rodent native to North Africa.

Ctenodactylids are small rodents native to Africa.

The ctenophoric creatures glowed in the dark ocean.

The ctenophorous creature glowed in the dark ocean.

The fish in the aquarium have ctenoids.

The ctenodont fish has unique markings on its scales.

Ctenophores are marine animals that have comb-like structures called ctenes.

The ctenacanthid was a prehistoric shark that lived during the Devonian period.