Terrapins live in water, mentioning their habitat helps clarify the context.

Aquatic Habitat

Some cultures view terrapins as a delicacy, which may be surprising to note.

Edible Delicacy

Not all small turtles are terrapins; 'terrapin' refers to specific species, mainly in brackish waters.

 so i've seen a biggest terrapin on my way to chitwa but i didn't have a nice view there so for now let's go to steve he has some

 in the slower moving rivers and pools throughout alentejo striped neck terrapins are abundant