As someone living near the ocean, or as someone concerned with sea level rise, I know the preciousness of coral. But, I didn’t know the rabbis of the Talmud did until I read today’s daf.
What is this tzi adir? Rav said: This is a great ship [burnei] used to collect coral from the sea. The Gemara explains: How do they perform this collection of coral? They bring six thousand men to work for twelve months of the year, and some say they bring twelve thousand men for six months of the year. And they load the ship with sand until it sinks to the bottom of the sea. A diver descends and ties flax ropes around the coral and ties the other ends of the ropes to the boat. And then they take the sand and cast it overboard, and the boat rises once again to the surface. And as it rises, it uproots and brings the coral with it.The Gemara comments: And this coral is so precious that it is exchanged for twice its weight in silver.
What a way to farm! Right now, coral is in grave danger. According to the EPA (https://www.epa.gov/coral-reefs/threats-coral-reefs) our reefs are threatened by “Physical damage or destruction from coastal development, dredging, quarrying, destructive fishing practices and gear, boat anchors and groundings, and recreational misuse (touching or removing corals). Pollution that originates on land but finds its way into coastal waters” and adds sedimentation, nutrients (in this case threatening ones), pathogens, toxic substances, trash and micro-plastics. Coral is also threatened by over fishing, coral harvesting (which today may look a bit different than on the daf). And increased water temperatures are killing coral through ocean acidification and coral bleaching. 25% of all marine life depend on coral reefs. Humans rely on coral reefs for costal protection, jobs, and medications.
So, yes, corals are more precious than fine silver.
Before you go, two other fabulous lines from the daf:
And Rabbi Yoḥanan also said: Anyone who studies Torah but does not teach it to others is likened to a myrtle in the wilderness. The myrtle has a pleasant fragrance, but there is nobody to enjoy it in the wilderness.
And a fun fact that the daf gives us that science confirms: The concave side of a crescent moon always faces away from the Sun! A waxing moon always has its lit side toward the western horizon; a waning moon always has its lit side toward the eastern horizon.
