Breeding report Thorichthys maculipinnis
Introduction
Thorichthys maculipinnis, also known by its old name Thorichthys ellioti, is a colorful and relatively peaceful Central American cichlid. With its vivid colors, interesting behaviors and well-matched character, it used to be a popular sight in many an aquarium. Nowadays, they are rarely seen in stores. Nevertheless, there are relatively few comprehensive breeding reports available on this species, especially from hobbyists.
In this article I share my own experiences of breeding Thorichthys maculipinnis in a spacious 2-meter-long community aquarium. It turned out to be a fascinating process not only because of the striking courtship and nesting behavior, but also because of the dedication with which the parents care for their offspring, even towards young fish of other species.
My adventure began with young parent birds about a year old, which grew into beautiful, caring parents. During several clutches I could observe their behavior closely and follow step by step how the eggs hatched and the young grew up. In this report I would like to take you through the different stages of this breeding process, share practical tips and tell about the challenges and beautiful moments I encountered along the way.
The parents
The parent fish with which this breeding began were young Thorichthys maculipinnis about a year old. When purchased, they were still quite small, measuring about three inches in length. As they grew, they developed beautiful colors and distinct behavioral differences between the sexes.
Although the difference between male and female in young fish is not always easy to tell yet, in my group some characteristics became more obvious as they got older. For example, it was noticeable that the male, especially during courtship, showed an intensely red belly and had his colors much brighter. Also, the male was bulkier in build compared to the female.
Thorichthys maculipinnis grew up in a community aquarium with other peaceful species. Couples began to form early on. Two pairs eventually tried to raise clutches, but especially the strongest pair proved successful. Their care and cooperation during the breeding process were remarkable and formed the basis for the ultimate success of the rearing.
The fish showed signs of their natural breeding behavior at an early age, cleaning potential laying sites and digging holes in the sand. When setting up an aquarium, keep this behavior in mind so they can bite into rounded sand instead of sharp sand or gravel.
The aquarium and conditions
Breeding took place in a spacious aquarium 2 meters long, 40 centimeters wide and 50 centimeters high. The setup of the tank was specially tailored to the natural behavior of Thorichthys maculipinnis. An alternation of open sandy areas and dense plant groups was chosen so that the fish had enough space to dig. My maculipinnis feel safe in this aquarium. If a cat sits with its nose against the glass looking at what kind of weird animal is swimming there, the maculipinnis look 5 centimeters on the other side of the glass at that weird animal sitting there. I find them quiet-active curious little monkeys.
Scattered around the tank were flat stones of about 7 by 6 centimeters. These stones turned out to be ideal for egg deposition: the parents chose a sheltered stone each time, which they carefully cleaned before laying their eggs. Small pits were also dug in the sand near these stones, which later served as safe refuges for the larvae once they hatched.
Water quality was carefully maintained by a powerful filter system, consisting of two Eheim Classic 2217 pot filters, filled with lava gravel and fitted with fine sponges at the outlets. These filters, together with an internal filter and skimmer, provided sufficient flow and a good oxygen supply. The spray bars, placed just above the water surface, distributed the water evenly along the length of the aquarium.
In terms of co-inhabitants, the aqu arium was a lively community, including Xiphophorus helleri (swordtails), Corydoras paleatus, Farlowella vittata, Aplocheilus lineatus and a single Pantodon buchholzi (butterflyfish). During breeding, the maculipinnis showed striking territorial behavior: within a radius of 15 to 25 centimeters around the nest, intruders were resolutely driven away. Yet the behavior remained fairly controlled; other fish were left alone outside the breeding area, EXCEPT the other maculipinnis, who should stay as far away as possible.
Recent Experience: Over the winter the 2 couples of maculipinnis had come out of breeding mode, now that the weather is getting warmer that mode has re-entered. Partner swapping was done where the newly formed pair chased the other male and female into the corners. They were both transferred to the Juwel. So my advice is also to keep only one pair per tank. (Maybe an even bigger tank will go better, but I don’t know).
Also interesting was the behavioral change in the maculipinnis themselves: while in their younger years they sometimes chased young swordtails, later they left them completely alone, possibly as a result of their own experience as caring parents.
The breeding process
The breeding of Thorichthys maculipinnis occurred in several phases, each with their own fascinating behaviors and dynamics. It all started with the courtship ritual, during which especially the male showed his best side. During this period his coloring changed: the belly turned intense red and his whole body seemed to shine brighter and brighter.
The courtship consisted of graceful dancing around the chosen nest site. The male showed his strength and dedication by actively digging pits: he picked up beaks full of sand only to spit it out elsewhere , looking for the perfect location. Together, the pair inspected the flat stones in the aquarium. Once a suitable stone was found, they carefully cleaned it with their beaks and fins.
When conditions were right, the female began laying eggs. During this she was closely followed by the male, who fertilized the eggs directly. During the incubation of the clutch, which usually consisted of 100 to 200 eggs, the pair remained very vigilant and constantly fanned water over the eggs to provide them with sufficient oxygen. The roles were neatly divided: especially the female fanned the eggs, while the male protected her and the nest site from intrusive other fish.
After a few days, the eggs hatched. The newly hatched larvae were carefully picked up with the beak by both parents and transferred to a previously dug nursery pit near the laying stone. Here they vibrated like a living cloud above the bottom, an extraordinary sight, almost like a fine’heat haze’ above the sand.
For the first 10 days after hatching, the parents remained extremely protective. They guarded their offspring intensively and kept other fish firmly at bay. As the young grew older, they gradually fledged more and the parents’ protection decreased slightly. In order to maintain a sufficient number of juveniles, it was necessary to catch some of them in time.
Catching was done with a siphon hose, which was used to carefully transfer young fish from the nursery pit to a separate rearing tank. Despite some losses due to the move, a nice group of young maculipinnis eventually grew up, thanks in part to a combination of clean water, good flow and fine food such as finely ground dry food and frozen artemia.
Raising the young fish
In the first days after hatching , the young were still particularly vulnerable. They remained close to the breeding pit, under constant protection of their parents. During this period they were hardly visible; like a quivering blur they hovered above the bottom. After about five to seven days they became slightly more active, and to increase their chances of survival, I decided to catch some of the young carefully with a fine siphon hose.
The young Thorichthys maculipinnis were initially housed in a ziggo breeder tank suspended below the spraybars ‘ outlets. This arrangement provided a constant supply of clean, oxygenated water without the young fish being washed away by the strong currents. As the young grew and got stronger, they moved to larger and larger holding tanks.
In terms of food, the youngsters were initially given very finely rubbed dry food, such as Sera Vipagran Nature, several times a day in small amounts. In addition, frozen artemia was offered regularly, which gave them an important protein boost during this critical growth stage. The presence of a few juvenile snails in the juvenile tanks helped clean up excess food and kept the water quality stable.
Despite careful handling, losses among the very smallest remained inevitable. The smallest juveniles were fragile and could easily fall victim to larger conspecifics or conditions during transfer. Nevertheless, I managed to raise about thirty healthy young fish from the first clutch.
It was noticeable that the young swordtails in the main tank, despite their smaller size, were no longer besieged by the adult elliotis. The parent fish even seemed to have become more tolerant of young fish of other species after their own breeding experience, an unexpected but nice development.
Details and personal experiences
The breeding of Thorichthys maculipinnis was not only instructive, but above all special to witness. What particularly stood out was the exceptional care of the parent fish. From cleaning the nest site to guarding and caring for the young fish, their cooperation and dedication were impressive. It was beautiful to see how they naturally divided their roles and took over each other’s tasks when necessary, for example during feeding.
A special moment was moving the newly hatched larvae to the nursery pit. Both parents gently picked up the young one by one in their mouths and carried them to their new, safe place. This behavior once again underscored how strongly parental care is developed in this species.
The effect of the breeding experience on the parent fish’s behavior toward other fish was also striking. Where young maculipinnis would sometimes chase a young swordtail before, after raising their own young they would leave them alone. A kind of “parental instinct” seemed to have developed that even extended to other species in the aquarium.
A challenge during the process was securing enough young to grow up. Despite careful work in transferring and providing optimal conditions, losses among the very young unfortunately could not be avoided. Nevertheless, the final result, about thirty healthy young fish, was more than worth it.
However, the most special thing about this experience was the complete picture: watching a pair of young elliotis grow up to be caring parents, observing their natural behavior and finally successfully guiding a new generation. It not only deepened my knowledge about this wonderful species, but also increased my appreciation for the complexity and beauty of natural behavior in the aquarium.
Conclusion
Breeding Thorichthys maculipinnis is a special experience that is very rewarding for the dedicated aquarium enthusiast. With their beautiful colors, fascinating courtship behavior and caring parental instinct, these cichlids show a natural side not easily seen in other aquarium inhabitants. Although guiding a successful breeding requires some preparation and attention, the result of watching a new generation grow up is well worth the effort.
With patience, a well-appointed aquarium and careful observation, almost any enthusiast can enjoy the wonderful cycle of life displayed by these beautiful Central American cichlids. Thorichthys ellioti thus proves that fish are much more than colorful appearances: they are living animals with complex behaviors, which in the right environment can show their full potential.
