BONAIRE 2016: Hunting Parties

Hunting Bon 16_0727

On the hunt. This sharptailed eel methodically went from hole to hole looking for prey while a Spanish hogfish and other fish stood by to take advantage.

 

HUNTING PARTIES

A behavior I observed on this Bonaire trip was group hunting. Well, animals in the ocean are always looking for food (or trying to avoid being food) but this trip included several instances of group hunting. Sort of.

Hunting Bon 16_0728

Nuclear Hunting, or maybe just Sloppy Seconds: The eel and its hunting companions — welcomed or not.

There’s a known phenomenon called Nuclear Hunting in which a small eel (like a goldentail moray) and one or more other fishes (like rock hinds) meet up, identify a nearby coral head as a target site and race toward it in one wave.

The eel darts into a hole or crevice and the hinds take up stations at exit holes. If it works, either the eel gets a fish inside the crevice or the hinds grab it on the way out. This appeared to be somewhat the case in two different gangs of sharptail eels, Spanish hogfishes and other fishes.

Or it could have just been what might be called Sloppy Seconds Hunting, in which a hunting sharptail was being closely followed by Spanish hogfishes and others hoping to get lucky. In any event, the sharptails were aggressively on the prowl, moving from coralhead to coralhead, sticking their head in one hole or crevice after another. I followed them, too; that’s called Photo Hunting. Sometimes it works.

It worked for the Spanish hogfish. In one crevice the eel went in, a little fishy guy popped out the back door – and hogfish scooped it in so quickly I couldn’t even identify the little guy or begin to get a photo.

THEN THERE WAS SHADOW HUNTING

Hunting Shadow Hunting Bon 16_0629

Shadow Hunting: A more conventional view, just not a great photo.

Shadow Hunting is a technique often indulged in by trumpetfishes, who don’t quite attach themselves onto an innocent stooge, like a parrotfish, and hover just above it while they swim around. By shadowing closely, the trumpetfish hides its presence and waits to strike at prey.

Hunting Shadow Hunting Bar Jack - Trumpetfish Bon 16_0628

BUG OFF! The bar jack was constantly maneuvering to get away from the trumpet fish — but not successfully.

I’ve always found them hard to photograph because the stooge, already unhappy with being hounded by a trumpetfish, is really spooked by a big, noisy, clumsy diver trying to get close enough for a shot. In this pair, the trumpetfish was driving the stooge (a bar jack) absolutely nuts and the bar jack was trying desperately to shake it off. So here’s a pair of photos that sort of give the idea.