ROI - Invasive Fish Species in Hawaii - Top Shot Spearfishing Target Species

Hawaii invasive fish species are damaging our fragile reef ecosystems. We’ve combined our love for the ocean and protecting it’s natural beauty with our love for spearfishing. You Can Help!

Our dive tour guests now get involved in the action by helping to remove invasive fish species from Hawaiian waters.

Spearfishing is a highly selective form of fishing and allows us to target each fish individually. Through spearfishing we are able to help keep the Hawaii reef ecosystem balanced by selective harvest and invasive species control.

We strongly believe in the conservation of our resources. That being said, there are fish we target and some that we do not. Take some time to study our target species so you will be able to quickly identify fish and get a shot off!


Roi (Peacock Grouper)

Public enemy #1.  The Roi was introduced from French Polynesia in the 1950’s by the State of Hawaii.  The goal was to add an additional food source to Hawaii, but it completely backfired!  After countless cases of Ciguatera poisoning it was determined that Roi was one of the main culprits.  The Roi has been the target of “silent hunters” ever since.  A voracious predator, the Roi consumes around 150 reef fish per year, including endemic species that are only found in Hawaii.

At Spearfish Maui the Roi is the only fish we target, but do not consume due to high rates of Ciguatera Toxin.  All Roi are donated to local organic farmers to and used as fertilizer for wonderful tropical fruits!

Kill them one and all.  No bag limit and no size limit.


To’au (Blacktail Snapper)

To’au is also an invasive species, but doesn’t consume as many fish as the Roi.  There is no minimum size on To’au and they are great eating!  Generally found near rocks, caves and darting around under ledges, the To’au is fast and quite skiddish.  Using some good camouflage, such as a coral head or reef should pay off with a nice shot!


Ulua (Giant Trevally)


These fierce fighters are the “holy grail” of reef and shore fishing in Hawaii!  Elusive and fast, they are up for the battle!  Shot placement is key, so aim true and hold on tight!  You will need to bring your “A” game if you are looking to land Hawaii’s prized game fish, the Ulua.  Minimum size is 12″ 

Uku (Gray Snapper)

The Uku is a delicious fish that like to hang out deeper on our reefs.  They respond well to palm (chum), so often times we bring along some Ika (squid) to chop up.  The Uku will often times come into shallower water after moon cycles to feed.  Keep your eyes peeled when the palu is in the water and be ready to dive deep!  Minimum size is 2 pounds.

Umaumalei (Orange Spine Unicorn)

In the same family as the Kala or Unicorn Fish, the Umaumalei makes for excellent sashimi!  Found in the shallows this fish is quick to flee if approached to quickly.  Try scratching some green lobe coral to get this guys attention.  Watch out for the razor sharp orange spikes near the tail!  Minimum size is 10″

Moano (Many Bar Goatfish)

Often times seen flicking around in the sand with their “whiskers.” these fish feed on small shrimp and other small critters.  Curious by nature, they respond well to flashy objects.  The trick here is finding them legal size to harvest.  Minimum size is 8″

Moana Kali (Blue Goatfish)

Usually found in schools of 2-4 fish, these fish are quick to head the other way when they see the pointy end of a spear!  Float and watch where they are headed and try to predict their path.  Dust some sand to make them think it’s lunchtime.  A deep breath and some patience will pay off with a great tasting fish!  Minimum size 12″

Awa (Milkfish)

The Awa or Milkfish is a strong fighter and get pretty big here in Hawaii!  Shiny silver with a deep forked tail, these fish are common in sandy areas, reefs and bays.  Sometimes curious they will often drift by to check you out….now is your chance!  Make sure the shot is behind the thick gill plate and hold on tight!  A 20lb. Awa puts up a good fight!  Minimum size is 12″