This week's theme: Fish

fish
- n , pl fish , fishes
1. a. any of a large group of cold-blooded aquatic vertebrates having jaws, gills, and usually fins and a skin covered in scales: includes the sharks and rays (class Chondrichthyes : cartilaginous fishes ) and the teleosts, lungfish, etc (class Osteichthyes : bony fishes )
b. ( in combination ): fishpond Related: ichthyic , ichthyoid , piscine
Source: World English Dictionary