Minecraft 1.9/1.10 Fish Mobs in Only One Command

/summon FallingSand ~ ~1 ~ {Block:command_block,Data:0,TileEntityData:{auto:1,Command:/fill ~2 ~ ~2 ~7 ~ ~4 minecraft:prismarine 2},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/fill ~2 ~ ~2 ~7 ~2 ~4 minecraft:stained_glass 0 hollow},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/fill ~3 ~-1 ~3 ~6 ~2 ~3 air},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/summon FallingSand ~3 ~-1 ~3 {Block:command_block,Data:5,TileEntityData:{Command:/give @p minecraft:spawn_egg 1 0 {EntityTag:{id:"Squid"},display:{Name:"Spawn_Fish"},ench:[{id:61,lvl:1}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:repeating_command_block,Data:1,TileEntityData:{auto:1,Command:/execute @e[name=Spawn_Fish] ~ ~ ~ /summon Squid ~ ~ ~ {PersistenceRequired:1,Silent:1,ActiveEffects:[{Id:14,Amplifier:1,Duration:1000000,ShowParticles:0b}],Passengers:[{id:"Item",Item:{id:fish,Count:1},Age:-32768,PickupDelay:32767}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:9,TileEntityData:{auto:1,Command:/tp @e[name=Spawn_Fish] ~ ~-256 ~},Time:1,DropItem:0}]}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/summon FallingSand ~4 ~-2 ~3 {Block:chain_command_block,Data:13,TileEntityData:{auto:1,Command:/give @p minecraft:spawn_egg 1 0 {EntityTag:{id:"Squid"},display:{Name:"Spawn_Salmon"},ench:[{id:61,lvl:1}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:repeating_command_block,Data:1,TileEntityData:{auto:1,Command:/execute @e[name=Spawn_Salmon] ~ ~ ~ /summon Squid ~ ~ ~ {PersistenceRequired:1,Silent:1,ActiveEffects:[{Id:14,Amplifier:1,Duration:1000000,ShowParticles:0b}],Passengers:[{id:"Item",Item:{id:fish,Damage:1,Count:1},Age:-32768,PickupDelay:32767}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:9,TileEntityData:{auto:1,Command:/tp @e[name=Spawn_Salmon] ~ ~-256 ~},Time:1,DropItem:0}]}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/summon FallingSand ~5 ~-3 ~3 {Block:chain_command_block,Data:13,TileEntityData:{auto:1,Command:/give @p minecraft:spawn_egg 1 0 {EntityTag:{id:"Squid"},display:{Name:"Spawn_Clownfish"},ench:[{id:61,lvl:1}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:repeating_command_block,Data:1,TileEntityData:{auto:1,Command:/execute @e[name=Spawn_Clownfish] ~ ~ ~ /summon Squid ~ ~ ~ {PersistenceRequired:1,Silent:1,ActiveEffects:[{Id:14,Amplifier:1,Duration:1000000,ShowParticles:0b}],Passengers:[{id:"Item",Item:{id:fish,Damage:2,Count:1},Age:-32768,PickupDelay:32767}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:9,TileEntityData:{auto:1,Command:/tp @e[name=Spawn_Clownfish] ~ ~-256 ~},Time:1,DropItem:0}]}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/summon FallingSand ~6 ~-4 ~3 {Block:chain_command_block,Data:13,TileEntityData:{auto:1,Command:/give @p minecraft:spawn_egg 1 0 {EntityTag:{id:"Squid"},display:{Name:"Spawn_Pufferfish"},ench:[{id:61,lvl:1}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:repeating_command_block,Data:1,TileEntityData:{auto:1,Command:/execute @e[name=Spawn_Pufferfish] ~ ~ ~ /summon Squid ~ ~ ~ {PersistenceRequired:1,Silent:1,ActiveEffects:[{Id:14,Amplifier:1,Duration:1000000,ShowParticles:0b}],Passengers:[{id:"Item",Item:{id:fish,Damage:3,Count:1},Age:-32768,PickupDelay:32767}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:chain_command_block,Data:9,TileEntityData:{auto:1,Command:/tp @e[name=Spawn_Pufferfish] ~ ~-256 ~},Time:1,DropItem:0}]}]}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/fill ~2 ~-6 ~3 ~2 ~-4 ~3 prismarine 1},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/setblock ~1 ~-7 ~3 stone_button 2},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/setblock ~1 ~-7 ~3 skull 4 replace {SkullType:3,ExtraType:"Pqroxysm"}},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/fill ~2 ~-6 ~2 ~7 ~-6 ~4 minecraft:prismarine 2},Time:1,DropItem:0,Passengers:[{id:"FallingSand",Block:command_block,Data:0,TileEntityData:{auto:1,Command:/fill ~ ~ ~ ~ ~-12 ~ air},Time:1,DropItem:0}]}]}]}]}]}]}]}]}]}]}]}