Rattlesnakefish specimen photograph
VulnerableCrotaluspisces

Crotaluspiscis horridus

Rattlesnakefish

Discovery LocationBrackish Waters of the Amazon Delta
Lead ResearcherDr. Imani Silva

Field Report Summary

Physical Description

Fish, approximately 3 feet long. Possesses a flattened body with mottled brown and green coloration reminiscent of a rattlesnake's scales. Instead of a typical tail fin, it has a segmented, bony structure resembling a rattlesnake's rattle. This 'rattle' can be vibrated rapidly to produce a hissing sound. The mouth is lined with venomous fangs. Has small, beady eyes on top of its head. Fins are translucent and fringed.

Habitat

Swamps, murky rivers, and brackish estuaries

Dietary Behavior

Feeds primarily on smaller fish and crustaceans, using venom to subdue larger prey.

Evolutionary Origin

Thought to have evolved from a rare mutation combining rattlesnake venom glands with specialized respiratory organs of deep-sea fish.

Behavioral Notes

Exhibits a unique rattling sound produced by modified operculum scales when threatened.

Citation: Dr. Imani Silva. Field observations of Crotaluspiscis horridus (Rattlesnakefish).The Index of Fictitious Fauna, Ainamals Research Institute.