What's the difference between boxfish and filefish?

Boxfish

Definition:

Example Sentences:

(1) The major hemolysin was identical with pahutoxin which was previously isolated from the Hawaiian boxfish O. lentiginosus, while the other hemolysin was a new choline chloride ester, named homopahutoxin.
(2) n. is described from the type host, the sheepshead, Archosargus probatocephalus (Walbaum), and other fishes of the northern Gulf of Mexico and southern Florida, including the Gulf toadfish, Opsanus beta (Goode and Bean); the spiny boxfish, Chilomycterus schoepfi (Walbaum); the slippery dick, Halichoeres bivittatus (Bloch); and the Atlantic croaker, Micropogon undulatus (Linnaeus).
(3) The mucus secreted by the Japanese boxfish O. immaculatus was extracted with n-butanol.

Definition:

(n.) Any plectognath fish of the genera Monacanthus, Alutera, balistes, and allied genera; -- so called on account of the roughly granulated skin, which is sometimes used in place of sandpaper.

Example Sentences:

(1) Facebook Twitter Pinterest Scribbled filefish near Ascension Island.
(2) The fiber connections of the accessory optic system (AOS) were investigated in a balistid fish, Navodon modestus (filefish), by means of horseradish peroxidase (HRP) and degeneration methods.
(3) Neurons projecting to the retina were identified electrophysiologically by antidromic responses in the preoptic retinopetal nucleus (PRN), which is the major origin of the centrifugal fibers to the retina in the filefish.
(4) The teeth of the filefish were investigated with light and scanning electron microscopy.