Tropical fish pictures and facts

Pinecone Fish Pictures and Facts

picture of a pinecone fishThe pinecone fish, or pineconefish, is an unusual armored fish of the Indo-Pacific whose body has a vaguely pinecone pattern made by the joining of hard scutes, which provide protection to the fish. The species featured on this page is Monocentris japonica. It is 8-15 cm long (3-6 in), and is yellow to orange in color. It has a large, blunt head, and interestingly, its dorsal fin is not situated on the center of its back like that of most fish, but is off-center, at a position of 1:00 or 11:00 when looking at the fish head on. The second dorsal and anal fins are at the rear of the animal, pointing backward.

picture of a pinecone fishAll pinecone fish have phosphorescent organs at either side of the lower jaw that can turn off and on by movement of the jaw. These bioluminescent organs attract plankton on which the pinecone fish feeds at night. The bioluminescence is caused by phosphorescent bacteria, which live with the fish in a symbiotic relationship. The color of the bioluminescence varies from yellow to blue-green, depending on amount of light reaching it. This fish generally seeks shelter by day in caves, crevices and under overhangs. It lives in tropical and sub-tropical waters.

picture of a pinecone fishThe pinecone fish is popular in tropical aquariums due to its unusual appearance, but it is considered a difficult fish to keep. Its preferred food is live brine shrimp, and it is active at night, preferring to hide by day.

There are four species of pinecone fish, Monocentris japonica, Monocentris meozelanicus, Monocentris reedi, and Cleidopus gloriamaris, also known as the Pineapplefish. They are all members of the Family Monocentridae, of the Order Beryciformes, Class Actinopterygii.

picture of a pinecone fish picture of a pinecone fish picture of a pinecone fish picture of a pinecone fish
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Just wanted to say that I enjoy all your posts

by 3DayEventer

Reading celebrity gossip is my guilty pleasure... lol.
Are you guys (who post pictures) the photographers, or do you find them on other sites to post here?
Saw Sinbad today, at a tropical fish store in Chatsworth. He'll be back there on Saturday to drop off his 9ft boa that they are going to sell for him. Couldn't figure out why he looked so familiar, so I said "You look so familiar..." and he replied that it's because he's always in the store. Then someone called his name from the back of the store and he laughed and said "Or maybe you've seen me somewhere else" Ha! I felt like an idiot, but at least I wasn't gushing at him or something equally annoying; we just talked snakes & reptiles while they finished my sale & his paperwork about the snake

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