Close-up ventral view of a black sea urchin, ~ 4 inches across, with short white spines.
Near shore tropical waters; coral reef ecosystem.
Spotted offshore of Leeward Oahu; location shown notional. Month and day notional; year is known with certainty. Image shows the bottom of the urchin, including its mouth--it spends its life "face down", except when someone turns it over. Original medium photoprint, taken with Nikonos III using flash and close-up kit; print subsequently scanned and image saved as digital file.