pajama cardinalfish (sphaeramia nematoptera)

saltwater fish aquarium colorful marine reef tropical coral tank aquatic beauty diversity exotic captivating vibrant species livestock hobby ornamental aquascape invertebrates community ecosystem captive underwater aquarist environment symbiotic behavior adaptation fascinating habitat fascination aquafarming maintenance serenity tranquility balance education conservation pajama cardinalfish sphaeramia nematoptera pajama-like stripes peaceful