Those are modified octagonal bricks numbers 6037, 6042, 6043, and 6032.
http://www.bricklink.com/catalogList.asp?pg=3&catString=7&catType=P
The blue corner pieces (6043) are only from set 6190-1 Shark's Crystal Cave
The others are likely from the 2162-1 Hydro Reef Wrecker
Those are modified octagonal bricks numbers 6037, 6042, 6043, and 6032.
http://www.bricklink.com/catalogList.asp?pg=3&catString=7&catType=P
The blue pieces are only from set 6190-1 Shark's Crystal Cave
The others are likely from the 2162-1 Hydro Reef Wrecker
Those are modified octagonal bricks numbers 6037, 6042, 6043, and 6032.
http://www.bricklink.com/catalogList.asp?pg=3&catString=7&catType=P
The blue corner pieces (6043) are only from set 6190-1 Shark's Crystal Cave
The others are likely from the 2162-1 Hydro Reef Wrecker
Those are modified octagonal bricks numbers 6037, 6042, 6043, and 6032.
http://www.bricklink.com/catalogList.asp?pg=3&catString=7&catType=P
The blue pieces are only from set 6190-1 Shark's Crystal Cave
The others are likely from the 2162-1 Hydro Reef Wrecker
