Shrimp/Gobi

[Paul B]

This shrimp who resides with the two gobies amazes me. I just looked closely at his tunnel that is quite long, and he built the entrance with a lintel. In construction when you build a door, window or other opening in rock or cement, you install a lintel or beam over the start of the doorway to hold up whatever is over it. The shrimp used a flat piece of calcium or a thin shell to prop it up. I can't tell how he supported the rest of the tunnel but he runs around in there and can make a "U" turn inside so I know it is structurally sound.
It is amazing and I wonder what engineering school he attended. :lovestory