From there, the food passes to the gut - Koi do not have a stomach as such, only a very long intestine.

They have well-developed stomachs and long intestines, capable of extracting nutriment from leaves.

They are basically just long intestines, taking food in one end and turning out compost at the other.

Larger stomachs and longer intestines have evolved because plant material is more difficult to digest than meat.

You could see the garage, too: a long gray intestine, its doors wide open.

Acei like most mbunas have a very long intestine so they can live of a few bites of algae a day.

These fish have relatively long intestines due to their usually herbivorous or detrivorous diets.

This short length is achieved by the spiral valve with multiple turns within a single short section instead of a long tube-like intestine.

They have a long small intestine and large caecum, employing hindgut fermentation to break down the tough materials in their food.

Therefore, compared to humans, they have a relatively small stomach but very long intestines to facilitate a steady flow of nutrients.