PAGE  1
000 A000000 04/30/2007
000 C000000 0001171471
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 CALAMOS CONVERTIBLE OPPORTUNITIES&INCOME FUND
001 B000000 811-21080
001 C000000 6302457200
002 A000000 2020 CALAMOS COURT
002 B000000 NAPERVILLE
002 C000000 IL
002 D010000 60563
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 N
007 B000000  0
007 C010100  1
008 A000001 CALAMOS ADVISORS LLC
008 B000001 A
008 C000001 801-29688
008 D010001 NAPERVILLE
008 D020001 IL
008 D030001 60563
010 A000001 STATE STREET BANK AND TRUST COMPANY
010 B000001 028-00733
010 C010001 BOSTON
010 C020001 MA
010 C030001 02111
012 A000001 THE BANK OF NEW YORK (COMMON)
012 B000001 85-05006
012 C010001 NEW YORK
012 C020001 NY
012 C030001 10286
012 A000002 THE BANK OF NEW YORK (PREFERRED)
012 B000002 85-05006
012 C010002 NEW YORK
012 C020002 NY
012 C030002 10286
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 CHICAGO
013 B020001 IL
013 B030001 60606
014 A000001 CALAMOS FINANCIAL SERVICES LLC
014 B000001 8-37854
015 A000001 THE BANK OF NEW YORK
      PAGE  2
015 B000001 C
015 C010001 NEW YORK
015 C020001 NY
015 C030001 10286
015 E010001 X
015 A000002 EUROCLEAR BANK
015 B000002 S
015 C010002 BRUSSELS
015 D010002 BELGIUM
015 E040002 X
018  000000 Y
019 A000000 Y
019 B000000   16
019 C000000 CALAMOSINV
020 A000001 J.P. MORGAN SECURITIES INC.
020 B000001 13-3224016
020 C000001     60
020 A000002 GOLDMAN, SACHS & CO.
020 B000002 13-5108880
020 C000002     36
020 A000003 SUSQUEHANNA CAPITAL GROUP
020 B000003 23-2626048
020 C000003     33
020 A000004 LEHMAN BROTHERS
020 B000004 13-2518466
020 C000004     31
020 A000005 MERRILL LYNCH
020 B000005 13-2740599
020 C000005     15
020 A000006 CITIGROUP GLOBAL MARKETS, INC.
020 B000006 11-2418191
020 C000006     12
020 A000007 BEAR STEARNS & CO., INC.
020 B000007 13-3299429
020 C000007      8
020 A000008 DEUTSCHE BANK SECURITIES, INC.
020 B000008 13-2730828
020 C000008      8
020 A000009 BANK OF AMERICA SECURITIES LLC
020 B000009 56-2058405
020 C000009      7
020 A000010 MORGAN STANLEY
020 B000010 13-2655998
020 C000010      3
021  000000      227
022 A000001 BANK OF NEW YORK
022 B000001 13-3894751
022 C000001   3491515
022 D000001       660
022 A000002 CITIGROUP GLOBAL MARKETS, INC.
022 B000002 11-2418191
      PAGE  3
022 C000002     42367
022 D000002      8341
022 A000003 LEHMAN BROTHERS
022 B000003 13-2518466
022 C000003     38776
022 D000003      6556
022 A000004 BANK OF AMERICA SECURITIES LLC
022 B000004 56-2058405
022 C000004     24409
022 D000004     17292
022 A000005 WACHOVIA SECURITIES LLC
022 B000005 34-1542819
022 C000005     19492
022 D000005     20135
022 A000006 UBS Financial
022 B000006 13-2638166
022 C000006      4792
022 D000006     27233
022 A000007 DEUTSCHE BANK SECURITIES, INC.
022 B000007 13-2730828
022 C000007     23906
022 D000007      1556
022 A000008 J.P. MORGAN SECURITIES INC.
022 B000008 13-3224016
022 C000008     18500
022 D000008       742
022 A000009 MORGAN STANLEY
022 B000009 13-2655998
022 C000009     13329
022 D000009      5362
022 A000010 MERRILL LYNCH
022 B000010 13-2740599
022 C000010      8921
022 D000010      7945
023 C000000    3735307
023 D000000     115666
024  000000 Y
025 A000001 MERRILL LYNCH
025 B000001 13-2740599
025 C000001 E
025 D000001    8754
025 A000002 LEHMAN BROTHERS
025 B000002 13-2518466
025 C000002 E
025 D000002   24071
025 A000003 CITIGROUP GLOBAL MARKETS, INC.
025 B000003 11-2418191
025 C000003 E
025 D000003   26020
025 A000004 GOLDMAN, SACHS & CO.
025 B000004 13-5108880
025 C000004 E
025 D000004   573
026 A000000 N
026 B000000 Y
      PAGE  4
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027  000000 N
028 A010000         0
028 A020000         0
028 A030000         0
028 A040000         0
028 B010000         0
028 B020000         0
028 B030000         0
028 B040000         0
028 C010000         0
028 C020000         0
028 C030000         0
028 C040000         0
028 D010000         0
028 D020000         0
028 D030000         0
028 D040000         0
028 E010000         0
028 E020000         0
028 E030000         0
028 E040000         0
028 F010000         0
028 F020000         0
028 F030000         0
028 F040000         0
028 G010000         0
028 G020000         0
028 G030000         0
028 G040000         0
028 H000000         0
030 A000000      0
030 B000000  0.00
030 C000000  0.00
031 A000000      0
031 B000000      0
032  000000      0
033  000000      0
035  000000      0
036 B000000      0
038  000000      0
042 A000000   0
042 B000000   0
042 C000000   0
042 D000000   0
      PAGE  5
042 E000000   0
042 F000000   0
042 G000000   0
042 H000000   0
043  000000      0
044  000000      0
045  000000 Y
046  000000 N
047  000000 Y
048  000000  0.800
048 A010000        0
048 A020000 0.000
048 B010000        0
048 B020000 0.000
048 C010000        0
048 C020000 0.000
048 D010000        0
048 D020000 0.000
048 E010000        0
048 E020000 0.000
048 F010000        0
048 F020000 0.000
048 G010000        0
048 G020000 0.000
048 H010000        0
048 H020000 0.000
048 I010000        0
048 I020000 0.000
048 J010000        0
048 J020000 0.000
048 K010000        0
048 K020000 0.000
049  000000 N
050  000000 N
051  000000 N
052  000000 N
053 A000000 Y
053 B000000 Y
053 C000000 N
054 A000000 Y
054 B000000 Y
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
      PAGE  6
054 M000000 Y
054 N000000 N
054 O000000 N
055 A000000 Y
055 B000000 N
056  000000 Y
057  000000 N
058 A000000 N
059  000000 Y
060 A000000 Y
060 B000000 Y
061  000000        0
062 A000000 Y
062 B000000   0.0
062 C000000   0.0
062 D000000   0.0
062 E000000   0.0
062 F000000   0.0
062 G000000   0.0
062 H000000   0.0
062 I000000   1.1
062 J000000   0.0
062 K000000   1.3
062 L000000  21.5
062 M000000   0.0
062 N000000   0.0
062 O000000   0.0
062 P000000 107.8
062 Q000000   0.0
062 R000000  35.1
063 A000000   0
063 B000000  6.9
064 A000000 N
064 B000000 N
066 A000000 Y
066 B000000 N
066 C000000 N
066 D000000 N
066 E000000 N
066 F000000 N
066 G000000 Y
067  000000 N
068 A000000 N
068 B000000 N
069  000000 N
070 A010000 Y
070 A020000 N
070 B010000 Y
070 B020000 Y
070 C010000 Y
070 C020000 N
      PAGE  7
070 D010000 Y
070 D020000 N
070 E010000 Y
070 E020000 N
070 F010000 Y
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 Y
070 H020000 N
070 I010000 Y
070 I020000 N
070 J010000 Y
070 J020000 Y
070 K010000 Y
070 K020000 Y
070 L010000 Y
070 L020000 Y
070 M010000 Y
070 M020000 Y
070 N010000 Y
070 N020000 Y
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 Y
070 Q010000 N
070 Q020000 N
070 R010000 Y
070 R020000 N
071 A000000    307608
071 B000000    325054
071 C000000   1127035
071 D000000   27
072 A000000  6
072 B000000    31981
072 C000000     6498
072 D000000        0
072 E000000       95
072 F000000     4630
072 G000000        0
072 H000000        0
072 I000000      526
072 J000000       34
072 K000000        0
072 L000000       82
072 M000000       22
072 N000000       23
072 O000000        0
072 P000000        0
072 Q000000       96
      PAGE  8
072 R000000       33
072 S000000        8
072 T000000       19
072 U000000        0
072 V000000        0
072 W000000       37
072 X000000     5510
072 Y000000     1471
072 Z000000    34535
072AA000000    42351
072BB000000     2361
072CC010000     3009
072CC020000        0
072DD010000    37780
072DD020000        0
072EE000000    15088
073 A010000   0.8000
073 A020000   0.0000
073 B000000   0.3200
073 C000000   0.0000
074 A000000     3123
074 B000000        0
074 C000000     8301
074 D000000   861526
074 E000000   279783
074 F000000     1050
074 G000000    10685
074 H000000        0
074 I000000   172103
074 J000000      213
074 K000000        0
074 L000000    17988
074 M000000     4717
074 N000000  1359489
074 O000000     2897
074 P000000      602
074 Q000000        0
074 R010000        0
074 R020000        0
074 R030000        0
074 R040000   172304
074 S000000   384536
074 T000000   799150
074 U010000    47487
074 U020000        0
074 V010000    16.83
074 V020000     0.00
074 W000000   0.0000
074 X000000      130
074 Y000000        0
075 A000000        0
      PAGE  9
075 B000000   783005
076  000000    20.17
077 A000000 N
077 B000000 N
077 C000000 N
077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
077 I000000 N
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 N
077 Q010000 N
077 Q020000 N
077 Q030000 N
078  000000 N
080 C000000        0
081 B000000   0
082 B000000        0
083 B000000        0
084 B000000        0
086 A010000    482
086 A020000   9192
086 B010000      0
086 B020000      0
086 C010000      0
086 C020000      0
086 D010000      0
086 D020000      0
086 E010000      0
086 E020000      0
086 F010000      0
086 F020000      0
087 A010000 COMMON STOCK
087 A020000 128117108
087 A030000 CHI
087 B010000 PREFERRED STOCK
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE   NIMISH BHATT
TITLE       TREASURER