We are proud to present our 22nd designer longfin clownfish, the Longfin Darwin Ocellaris Clownfish. Sea & Reef Aquaculture was the first hatchery to produce a clownfish with long flowing fins that display a rounded and more even outline. This sets them apart from other produced Longfin Clownfish that typically display jagged, stiff fins with uneven edges. The Sea & Reef Longfin genetics are unique and create a Longfin Clownfish that is aesthetically pleasing to look at due to the flowing outline of their beautiful fins. Furthermore, the longer fins do not impede normal behavior or swimming ability of the clownfish. The common morphology for all our Longfin Clownfish is that the fins are only slightly elongated as early juvenile fish, but their fins continue to grow as the fish grow and mature. The fully grown fins on a mature clownfish are spectacular and it can be mesmerizing to watch a pair of longfin clownfish swim around and interact with the swaying tentacles of their anemone. The Longfin Darwin Ocellaris Clownfish was made available to hobbyists on February 28, 2025. It is a longfin variation of our Darwin Ocellaris Clownfish.

The Creation of Our Longfin Clownfish
The mutation that created our line of longfin clownfish came from a single fish. In December 2013, our Hatchery Manager Brandon Weik was observing a tank of several thousand Darwin Ocellaris Clownfish (also called Black Ocellaris or Black & White Ocellaris) when he spotted a fish that looked very different from his brothers (all clownfish are born male). It had long flowing fins and was being harassed by the other fish, probably because of its different look. The fish was isolated and later paired up. A story was published about our findings in the April 2014 issue of Reef Builders. You can read the article by clicking here. Since 2013, Sea & Reef Aquaculture has produced more than 20 variations of Longfin Clownfish

Temperament & Captive Care
The temperament and captive care requirements for the Longfin Darwin Ocellaris Clownfish are very similar to that of the regular Ocellaris clownfish. It is relatively peaceful and hardy. They thrive in saltwater aquariums with or without an anemone present.

Feeding
Most clownfish are omnivorous feeders, meaning that they will consume a variety of different food types. In nature the diet of clownfish consists of crustaceans (such as copepods and amphipods), algae, polychaete worms, and leftovers from the anemone’s meal. Our captive bred fish are conditioned to eat a variety of aquarium diets including pellets, flake food, frozen Mysis shrimp, and frozen brine shrimp.

Aquarium host anemones
Longfin Darwin Ocellaris Clownfish will readily accept a wide variety of host anemones and many hobbyists keep it with the popular and hardy Bubble Tip Anemone (Entacmaea quadricolor). As a reference the natural host anemones of the regular ocellaris clownfish are Magnificent Sea Anemone (Heteractis magnifica), Sebae Anemone (Heteractis crispa), and Giant Carpet Anemone (Stichodactyla gigantea).