Rays

6 species

Rays are a fascinating and unique group of fish that belong to the class Elasmobranchii, which also includes other cartilaginous fish like sharks. They are characterized by their flattened bodies, large pectoral fins that are fused to their heads, and long, whip-like tails. Rays are known for their graceful swimming, often appearing to 'fly' through the water with their undulating fins. They are found in a variety of marine environments, from shallow coastal waters to the deep sea, and some species even inhabit freshwater rivers and lakes.

One of the most distinctive features of rays is their gill slits, which are located on the underside of their bodies. This adaptation allows them to lie flat on the ocean floor while still being able to breathe. Rays also have a unique feeding mechanism; many species have specialized, plate-like teeth that they use to crush the shells of mollusks and crustaceans. Some rays, like the manta ray, are filter feeders and consume plankton by swimming with their mouths open.

When it comes to keeping rays in a home aquarium, it's important to note that they require large tanks with plenty of open swimming space. The tank should have a fine, sandy substrate to prevent damage to their delicate undersides, and water quality must be meticulously maintained. Rays are generally peaceful but can be sensitive to changes in their environment. Hobbyists should also be aware that some species of rays have venomous spines on their tails, which they use for defense.

Overall, rays can make for a captivating and rewarding addition to a large, well-maintained marine aquarium. Their unique behaviors and striking appearance offer endless fascination for both novice and experienced aquarists.