Hydrolagus colliei (Spotted Ratfish)
- Images of a preserved specimen of this species, including an enlargement of the tooth plates.
- http://www.digimorph.org/specimens/Hydrolagus_collei/head/

Chimaeroids
- Painting by Roy Troll of Hydrolagis trolli, a newly named species, and information on the fossil remains of ratfish from the Smoky Hill Chalk.
- http://www.oceansofkansas.com/Chimaeroid.html

Spotted Ratfish: Hydrolagus colliei
- Two clear photographs of this species from Cold Water Images.
- http://www.coldwaterimages.com/spotted_ratfish.html

Hydrolagus colliei
- Several photographs of the spotted ratfish.
- http://darwin.zoology.gla.ac.uk/~rpage/ispecies/?q=Hydrolagus+colliei&submit=Go

Spotted Ratfish
- Photographs and information from Wikipedia on this interesting species, Hydrolagus colliei, which gets its name from its pointed rat-like tail.
- http://en.wikipedia.org/wiki/Spotted_ratfish

Australian Ghost Shark
- Photograph and information on this fish, Callorhinchus milii, which is known as the elephant fish in Australia and New Zealand where it is found.
- http://en.wikipedia.org/wiki/Australian_ghost_shark

Chimaera
- Information from Wikipedia and several photographs of this fish, sometimes known as the ratfish, rabbitfish or ghost shark, and details of the six genera in three families.
- http://en.wikipedia.org/wiki/Chimaera

Chimaera: Hydrolagus affinis
- Drawing and description of this curiously shaped fish and details of its range.
- http://www.gma.org/fogm/Hydrolagus_affinis.htm