Like many islands, the Grenadines — Bequia, Canouan, Mayreau, Mustique, the Tobago Cays, Union Island, Palm Island — and their head maiden, St. Vincent, rose from the molten gurglings of the earth. These islands are often called the "muck-diving capital of the Caribbean," that is something of a misnomer, conjuring famous muck-diving sites with small reef creatures and silty waters. On reefs off these islands, the visibility can top 100 feet. There is no shortage of macro subjects disguised among the bedrock: invisible shrimp, squat anemone shrimp and sunspot anemone shrimp, neck crabs, blackhead blennies, decorator crabs, three-spotted scorpionfish and sharptail eels.