All statistics are based on contigs of size >= 500 bp, unless otherwise noted (e.g., "# contigs (>= 0 bp)" and "Total length (>= 0 bp)" include all contigs).
Suggestion: assemblies jelly.out, Oly_Redundans_Output_scaffolds.reduced, Oly_Redundans_Output_Try_2_scaffolds.reduced, 20171005_redundans_scaffolds.reduced, 20171004_redundans_scaffolds.reduced, 20171024_docker_oly_redundans_01_scaffolds.reduced, Ostrea_lurida contain continuous fragments of N's of length >= 10 bp. You may consider rerunning QUAST using --scaffolds (-s) option!

Assembly                    oly_pacbio_.contigs  20171018_oly_pacbio.contigs  jelly.out   Oly_Illumina_Platanus_Assembly_Oly_Out__contig  Oly_Platanus_Assembly_Kmer-22_Oly_Out__contig  20170918_oly_pacbio_racon1_consensus  Oly_Redundans_Output_scaffolds.reduced  Oly_Redundans_Output_Try_2_scaffolds.reduced  20171005_redundans_scaffolds.reduced  20171004_redundans_scaffolds.reduced  20171024_docker_oly_redundans_01_scaffolds.reduced  Ostrea_lurida
# contigs (>= 0 bp)         3388                 11246                        696946      193390                                          12395459                                       2896                                  3642                                    300593                                        2078                                  2315                                  7408                                                765755       
# contigs (>= 1000 bp)      3388                 11246                        159429      0                                               141851                                         2776                                  18                                      137301                                        1971                                  2315                                  7408                                                184804       
# contigs (>= 5000 bp)      3338                 10751                        68750       0                                               2631                                           2492                                  0                                       24009                                         1744                                  2282                                  7270                                                33792        
# contigs (>= 10000 bp)     2662                 5469                         35320       0                                               157                                            1715                                  0                                       6254                                          1202                                  1811                                  4127                                                8733         
# contigs (>= 25000 bp)     119                  547                          7048        0                                               0                                              88                                    0                                       586                                           204                                   304                                   823                                                 553          
# contigs (>= 50000 bp)     3                    17                           894         0                                               0                                              2                                     0                                       36                                            66                                    91                                    216                                                 21           
Total length (>= 0 bp)      46288879             132146852                    1253001795  16949361                                        1633553496                                     33496662                              968128                                  546928670                                     29303793                              40561504                              111139362                                           776306190    
Total length (>= 1000 bp)   46288879             132146852                    1140787867  0                                               257934533                                      33421961                              25115                                   476206320                                     29235249                              40561504                              111139362                                           642346712    
Total length (>= 5000 bp)   46112108             130500089                    932263178   0                                               17549692                                       32715909                              0                                       220366692                                     28679494                              40443936                              110651100                                           302087694    
Total length (>= 10000 bp)  40284040             90550146                     691523275   0                                               1977623                                        26428099                              0                                       99646272                                      24316776                              36412694                              86479013                                            131223850    
Total length (>= 25000 bp)  3651638              17592727                     261425921   0                                               0                                              2808408                               0                                       19574809                                      9732934                               14794719                              37385867                                            17851807     
Total length (>= 50000 bp)  174603               940167                       57741906    0                                               0                                              127712                                0                                       2106424                                       5126002                               7662042                               17006058                                            1283294      
# contigs                   3388                 11246                        213264      4                                               373312                                         2856                                  114                                     188612                                        2045                                  2315                                  7408                                                259186       
Largest contig              61184                76280                        194507      764                                             23341                                          68522                                 3063                                    78788                                         252259                                322397                                256714                                              130073       
Total length                46288879             132146852                    1180563613  2693                                            417951161                                      33483762                              85207                                   513841258                                     29292260                              40561504                              111139362                                           697528655    
GC (%)                      36.45                36.40                        36.57       46.05                                           35.70                                          36.43                                 36.24                                   35.90                                         36.39                                 36.46                                 36.34                                               35.83        
N50                         14117                13157                        12433       684                                             1245                                           13763                                 682                                     4175                                          16565                                 17679                                 16998                                               4204         
N75                         11415                9066                         5983        644                                             784                                            10543                                 569                                     2103                                          11605                                 12211                                 10536                                               2078         
L50                         1230                 3329                         26241       2                                               97869                                          896                                   40                                      32022                                         452                                   573                                   1724                                                43989        
L75                         2145                 6369                         60202       3                                               204757                                         1588                                  74                                      75613                                         984                                   1274                                  3823                                                103370       
# N's per 100 kbp           0.00                 0.00                         6580.58     0.00                                            0.00                                           0.00                                  17127.70                                1019.31                                       918.03                                695.24                                626.41                                              19149.50