Claim: Were fishponds in Ancient Hawaiian aquaculture located next to the mouth of a stream and did they have porous lava walls that let in seawater (or sometimes fresh or brackish water, as in the case of the "Menehune" fishpond, a historic Hawaiian fishpond listed on the U.S. National Register of Historic Places, near Līhuʻe, Kauaʻi), but prevent the fish from escaping?
Answer: Yes