Reef ball?

Saw these downstairs of my block. They were in the middle of some construction work. One day suddenly I saw these there.

They look exactly like the reef balls we see underwater don't they? I wonder what is it for? Can't be that they really are making reef balls.. cos they are in the middle of some construction work. But if they are not reef balls, if they are made for construction purpose, what is it for??

Perhaps it really is for construction purpose and the person who invented reef balls got the idea from here.

What a beautiful shark... died.. so sad..

Oh my God, the fisherman have captured a thresher shark! The beautiful thresher shark... what a shame..................

Copied from Sin Chew Jit Poh newspaper:

怪鯊魚尾巴魚鰓特別長
updated:2006-10-03 19:56:31 MYT


（亞羅士打訊）吉打港口漁民出海時捕獲一條長約10尺，重30多公斤的鯊魚。漁民趙時新用驚奇地說，漁民一般只見過100公斤重的魚，尾巴長1尺至1尺半，但這條鯊魚只有30多公斤重，尾巴和魚鰓卻有4尺半和20多吋長。

這條罕見的鯊魚，是進江漁行東主蕭清獅的拖網漁船所捕獲的，並於週二早上10點多載返吉打港口。（光明日報‧2006/10/03）