Aulonocara hansbaenschi, Red Shoulder Peacock in an exhibit that shows exotic fish at the Cabo Rojo National Wildlife Refugee

Los machos Hemichromis lifalili y una foto de los alevines

Los pececillos del desove actual están comenzando a tratar de nadar. La hembra aun no los ha sacado de la cavidad en que nacieron pero creo que lo hará una vez que comiencen a nadar. El macho está más agresivo que en los días anteriores y ahora los otros peces han tenido que refugiarse en el lado de la pecera opuesto al lugar donde ocurrió el desove. El padre de los pececillos ha desarrollado un impresionante color probablemente inducido por los efectos hormonales de la reproducción. En lugar de ser de un color rojo brillante como todos los lifalili que he visto por aquí, este macho ha desarrollado una multitud de puntitos azules que eclipsan su color rojo. El color rojo del macho es más oscuro que el de la hembra. La hembra sigue perdiendo peso ya que apenas sale de la cavidad donde están los pececillos. Es una excelente mama, por lo que veo todos o casi todos los que nacieron están aun vivos, ya se le ven claramente los ojos y la boca.

El color azul de las escamas del macho es difícil de capturar en una foto ya que el “flash” lo despinta hasta hacerlo ver casi blanco. Por eso incluyo unas fotos del macho bajo distintas iluminaciones. El macho subdominante es el pez menos colorido de la pecera y pasa casi todo el tiempo escondido o huyendo del macho dominante. Sin embargo no tiene las aletas rotas ni otras señales de abuso severo. Las hojas de teca y la vegetación flotante de la pecera le proveen al macho y a las hembras no reproductoras de refugios esconderse de los individuos reproductores.

fotografia con flash

macho fotografiado con luz del sol

macho y hembra

macho subdominate

La hembra cuida sus crias con un celo admirable

Alevines que ya han consumido una cantidad considerable del saco vitelino

The female red jewel fish Hemichromis lifalili and her fry

The eggs of the female Hemichromis lifalili about which I wrote in an earlier post hatched during the weekend. The fry are now at the bottom of the cavity where spawning occurred. The fry are full of vibrant activity as they all move their tiny tails incessantly. At this stage of their development they are called fry because they hardly resemble a proper fish. In the image you can see the mass fry but only the yolk sacs can be seen clearly. The yolk sacks are attached to the belly of the fry. The fry are little more than a line of muscle tissue a few millimeters long. Because the fry are vigorously shaking their tiny bodies and are transparent they cannot be seen well in the picture which shows the massed fry. But we can distinguish some black dots above the yolk sacs. These dots give rise to the eyes and nervous system of fishes.
The female defends her fry with impressive ferocity, in the images we can see that it has a bite on the area over the mouth. I do not know which of the fish in the tank bit her but I suspect it was the male with whom she spawned . To my surprise the female was aggressive when the male approached the spawning cave and stopped him from to entering it. She blocked him from entering where the the fry were by arching her body and lifting the scales covering the gills. The male spent most of his time on the other side of the tank with the other fish, his level of aggressiveness was mild compared with that of the female.
The previous spawning that occurred in the tank was the product of the male of this spawning but with a different female. Apparently the male lost interest in that spawning the moment the fry were born and left the female alone to defending their offspring. The female of the previous spawning took the fry from the trunk and hid it in a depression in the material at the bottom of the tank, but she could not defend the fry from the other fish and lost them all.
In a few days the female of this photo also have to move their young to the bottom of the tank to allow them to forage for food. It remains to be seen whether the male will help her defend them. From what I could see the males showed a somewhat ambiguous behavior, he seemed to behave aggressively but at the same time he was obviously eyeing the other females, the latter development does not augur well for the survival of the fry.

A red Jewel fish (Hemichromis lifalili) female tending her eggs

In this image we can see a female lifalili tending her recently spawned eggs. The female is using her pectoral fins to create currents of water over the eggs so that they receive the oxygen they need to live. The female also mouths the eggs. I have read that the female removes from the spawn those eggs that become infected by fungus. This spawn is in an immaculate condition so it seems that the female is successfully managing to control the attack of the fungus on her eggs . This is the second spawning of my lifalili. These fish have been surprisingly precocious, they began to spawn when just a little bit over about two inches in lenght, about four weeks after they are acquired. It is said that adults can reach six inches long but the most of those I've seen locally are no more than four. When these fish are in the process of spawning they become especially aggressive toward other fish. To achieve this image I had to plan carefully how to provide them with a suitable spawning site that would also allow for ease of photographing. The lifalili seem to prefer spawning in enclosed areas. For this reason it is common for aquarists to provide them with terracotta pots usually placed on their side. The problem is that this type of arrangement, in a tank like mine, makes it difficult to photograph the fish caring for the eggs and fry. I put in the tank two pieces of ceramic that resemble a mass of roots and which have at their top tubular cavities that open toward the surface.. To reduce the potential of a spawning in a hidden or inaccessible elsewhere in the tank I do not use any other object that has a cavity suitable for spawning. Since the opening of the cavity is facing the surface it is relatively easy to photograph the female taking care of the eggs.