The Blackspot Sergeant is a solitary damselfish which lives near the surface in shallow waters. They’re fairly common around here, but quite shy, so tricky to photograph. Coloration can vary, but the black spot above the base of the tail is ever present, hence the name.
This month’s Sunday Stills color challenge theme is ‘Metallic.’ See more responses here.
The top photo shows a Metallic Skink (Lampropholis delicata), which is also known as Delicate Skink, Garden Skink, Rainbow Skink, and less-flatteringly, Plague Skink. This one was crossing a road, luckily a lightly-traveled one.
The second photo is an orchid with the catchy name of Rhyncholaeliocattleya Shingfong Gold Gem ‘Golden Gem.’
The third photo is shoal of small, silvery fish, which I think are the aptly named Hawaiian Silversides.
One of the perks of snorkeling here is that there are often rainbows to be seen, such as this one just north of Lapakahi.
Recent swells stirred up the water so visibility in the water wasn’t great. Instead, I focused upward to where bubbles and debris floated on the surface, yielding some interesting images.
An assortment of sergeantfishes swim beneath floating debris, gathered by a series of big swells. Unlike the fish, I got to swim through the debris, which can sometimes include sizable chunks of wood.
The surge zone is the area above shallow reefs near shore, where incoming swells churn up the water. It’s home to a variety of fish including chubs and flagtails, the turbulent, bubbling water acting as a screen from predators.
Chubs will venture out a ways during the day, but flagtails only emerge at night to feed on plankton.
Rainbow Chubs are rare in Hawaii. I’ve seen them before, though not often. These three were in an area where I saw two the week before. My fish book says they drift in as waifs from the Eastern Pacific, but I wonder if perhaps a breeding population is establishing itself in Hawaii.
I know this fish as a Crocodile Needlefish (Tylosurus crocodilus), a name explained by looking at the jaws and teeth. Elsewhere, it’s known as a Houndfish. When I first saw it, I thought it might have a bit of fishing gear hooked into its mouth. It was working its jaws up and down, as if it might be trying to dislodge something. But when I got closer, I saw it had a fish in it’s mouth.
The unlucky fish looks like a toby, probably an Hawaiian White-spotted Toby. Except the unlucky fish might be the needlefish because the toby has clearly inflated itself, as they do. Not only that, but the skin of these tobies is highly toxic. My fish book tells of a diver who found a frogfish with one of these tobies inflated in its mouth. The frogfish was dead, though whether suffocated or poisoned he couldn’t tell. He freed the toby, which swam away none the worse for wear!
Graham's Island 