Tuberous receptors are electroreceptors that are specialized to respond to high-frequency electrical fields (electric organ discharge

Electric organ

In biology, the electric organ is an organ common to all electric fish used for the purposes of creating an electric field. The electric organ is derived from modified nerve or muscle tissue...

s or EODs), and hence are found only in fish

Fish

Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups...

 with an active electrical sense that can generate their own electrical fields. They are mostly found on weakly electric fishes such as gymnotiforms and mormyrids. These receptors are particularly receptive to their own electrical fields, and can detect perturbations caused by foreign objects.

There are two types of tuberous receptors, t-type and p-type.

Species which use tuberous receptors include the glass knife fish

Knifefish

Knifefish may refer to several knife-shaped fishes:* The Neotropical or weakly electric knifefishes, order Gymnotiformes, containing five families:** Family Gymnotidae ** Family Rhamphichthyidae...

(Eigenmannia virescens), a gymnotiform.