The Gastrointestinal Tract of Fish - Aquaculture Nutrition: Gut Health, Probiotics and Prebiotics - page 7

Fig. 1.5 Alimentary tract of detritivorous mrigal ( Cirrhinus mrigala ) showing extremely coiled intestine.
(Source: Arun K. Ray.) For colour detail see Plate 4.

A B

L

Mv

Mv

L

M

Tj

Tj

Mb

Mb

M

M

C D

Tj

Mb

L

Mv

M

Gc

Tj

L

Fig. 1.6 Transmission electron microscopy images from the intestine of tilapia Oreochromis niloticus
(A and B) and zebrafish Danio rerio (C and D). Images show the regional variation in the brush border
formation (microvilli length and abundance) between the anterior (A and C) and posterior (B and D)
intestine. Gc, goblet cell; L, lumen; M, mitochondria; Mb, cell membrane; Mv, microvilli; Tj, tight junction.
Scale bar = 1 μ m. (Source: Merrifield and Harper, unpublished.)