Na toll,
ein Satz, und schon habe ich nen Ohrwurm:
Weiß der Geier 
edit: ui, eben kurz eingeloggt, und scheinbar sofort den Server zum Abschmieren gebracht. Tschuldigung...
edit²: Schon wieder

Das hier sagt der crashlog, eine vollständige txt ist angehangen. Ich lese da ziemlich viele Mobs, kanns daran liegen?
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Thread: Client thread
Stacktrace:
at drzhark.mocreatures.entity.MoCEntityAquatic.getPetName(MoCEntityAquatic.java:138)
at drzhark.mocreatures.client.renderer.entity.MoCRenderMoC.doRenderMoC(MoCRenderMoC.java:33)
at drzhark.mocreatures.client.renderer.entity.MoCRenderMoC.func_76986_a(MoCRenderMoC.java:27)
at drzhark.mocreatures.client.renderer.entity.MoCRenderMoC.func_76986_a(MoCRenderMoC.java:18)
-- Entity being rendered --
Details:
Entity Type: mocreatures.Fishy (drzhark.mocreatures.entity.aquatic.MoCEntityFishy)
Entity ID: 3876
Entity Name: Fishy
Entity's Exact location: -224.85, 61.05, 145.67
Entity's Block location: World: (-225,61,145), Chunk: (at 15,3,1 in -15,9; contains blocks -240,0,144 to -225,255,159), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Entity's Momentum: 0.00, 0.00, 0.00
Entity's Passengers: []
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
-- Renderer details --
Details:
Assigned renderer: drzhark.mocreatures.client.renderer.entity.MoCRenderMoC@21e9097
Location: 13.48,-9.99,-9.12 - World: (13,-10,-10), Chunk: (at 13,-1,6 in 0,-1; contains blocks 0,0,-16 to 15,255,-1), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Rotation: 102.65625
Delta: 0.85884976
Stacktrace:
at net.minecraft.client.renderer.entity.RenderManager.func_188391_a(RenderManager.java:397)
at net.minecraft.client.renderer.entity.RenderManager.func_188388_a(RenderManager.java:374)
at net.minecraft.client.renderer.RenderGlobal.func_180446_a(RenderGlobal.java:804)
at net.minecraft.client.renderer.EntityRenderer.func_175068_a(EntityRenderer.java:1727)
at net.minecraft.client.renderer.EntityRenderer.func_78471_a(EntityRenderer.java:1556)
-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityPlayerSP['Raeuberbach'/4595, l='MpServer', x=-238.31, y=71.03, z=154.72]]
Chunk stats: MultiplayerChunkCache: 441, 441
Level seed: 0
Level generator: ID 06 - BIOMESOP, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (-152,64,248), Chunk: (at 8,4,8 in -10,15; contains blocks -160,0,240 to -145,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 129665604 game time, 133157150 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 274 total; [MoCEntityJellyFish['JellyFish'/3584, l='MpServer', x=-282.50, y=62.31, z=79.50], MoCEntityAnt['Ant'/4611, l
[...] hier stehen im Log weitere, ziemlich viele, Mobs [...] Retry entities: 0 total; []
Server brand: fml,forge
Server type: Non-integrated multiplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:498)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2660)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:392)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
-- System Details --
Details:
Minecraft Version: 1.10.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1530126496 bytes (1459 MB) / 5355339776 bytes (5107 MB) up to 5355339776 bytes (5107 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx5G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 4, tallocated: 105
FML: MCP 9.32 Powered by Forge 12.18.1.2082 Optifine OptiFine_1.10.2_HD_U_C4_pre 91 mods loaded, 91 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJA mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
[...]hier stehen alle weiteren Mods [...]
Loaded coremods (and transformers):
CCLCorePlugin (CodeChickenLib-1.10.2-2.2.3.57-universal.jar)
codechicken.lib.asm.ClassHeirachyManager
codechicken.lib.asm.RenderHookTransformer
LoadingPlugin (Bloodmoon-MC1.9.4-1.4.1.jar)
lumien.bloodmoon.asm.ClassTransformer
LoadingPlugin (RandomThings-MC1.10-3.7.4.jar)
lumien.randomthings.asm.ClassTransformer
LoadingPlugin (Quark-r1.0-59.jar)
vazkii.quark.base.asm.ClassTransformer
llibrary (llibrary-1.5.1-1.10.2.jar)
net.ilexiconn.llibrary.server.core.plugin.LLibraryTransformer
net.ilexiconn.llibrary.server.core.patcher.LLibraryRuntimePatcher
ArsMagica2-Preloader (ArsMagica2_1.5.0-6.jar)
am2.asm.Transformer
EnderCorePlugin (EnderCore-1.10.2-0.4.1.53-beta.jar)
com.enderio.core.common.transform.EnderCoreTransformer
DLFMLCorePlugin (DynamicLights-1.10.2.jar)
atomicstryker.dynamiclights.common.DLTransformer
HFTransformer (Harvest-Festival-1.10.2-0.5.8.jar)
joshie.harvest.asm.HFTransformer
FMLPlugin (InventoryTweaks-1.61-58.jar)
invtweaks.forge.asm.ContainerTransformer
ShetiPhian-ASM (shetiphiancore-1.10.0-3.3.3.jar)
shetiphian.core.asm.ClassTransformer
BetterFoliageLoader (BetterFoliage-MC1.10-2.0.13.jar)
mods.betterfoliage.loader.BetterFoliageTransformer
GL info: ' Vendor: 'ATI Technologies Inc.' Version: '4.1.11251 Compatibility Profile Context' Renderer: 'AMD Radeon HD 6670'
Pulsar/tconstruct loaded Pulses:
- TinkerCommons (Enabled/Forced)
- TinkerWorld (Enabled/Not Forced)
- TinkerTools (Enabled/Not Forced)
- TinkerSmeltery (Enabled/Not Forced)
- TinkerGadgets (Enabled/Not Forced)
- TinkerOredict (Enabled/Forced)
- TinkerIntegration (Enabled/Forced)
- TinkerFluids (Enabled/Forced)
- TinkerMaterials (Enabled/Forced)
- chiselsandbitsIntegration (Enabled/Not Forced)
- WailaIntegration (Enabled/Not Forced)
List of loaded APIs:
* actuallyadditionsapi (26) from ActuallyAdditions-1.10.2-r70.jar
[...]und wieder verschiedene Mods [...] * WailaAPI (1.3) from Waila-1.7.0-B3_1.9.4.jar
EnderIO: Found the following problem(s) with your installation (That does NOT mean that Ender IO caused the crash or was involved in it in any way. We add this information to help finding common problems, not as an invitation to post any crash you encounter to Ender IO's issue tracker.):
* Optifine is installed. This is NOT supported.
This may (look up the meaning of 'may' in the dictionary if you're not sure what it means) have caused the error. Try reproducing the crash WITHOUT this/these mod(s) before reporting it.
Detailed RF API diagnostics:
* RF API class 'EnergyStorage' is loaded from: jar:file:/C:/Users/Raeuberbach/AppData/Roaming/.minecraft/mods/mcjtylib-1.10-2.2.0.jar!/cofh/api/energy/EnergyStorage.class
* RF API class 'IEnergyConnection' is loaded from: jar:file:/C:/Users/Raeuberbach/AppData/Roaming/.minecraft/mods/mcjtylib-1.10-2.2.0.jar!/cofh/api/energy/IEnergyConnection.class
* RF API class 'IEnergyContainerItem' is loaded from: jar:file:/C:/Users/Raeuberbach/AppData/Roaming/.minecraft/mods/mcjtylib-1.10-2.2.0.jar!/cofh/api/energy/IEnergyContainerItem.class
* RF API class 'IEnergyHandler' is loaded from: jar:file:/C:/Users/Raeuberbach/AppData/Roaming/.minecraft/mods/mcjtylib-1.10-2.2.0.jar!/cofh/api/energy/IEnergyHandler.class
* RF API class 'IEnergyProvider' is loaded from: jar:file:/C:/Users/Raeuberbach/AppData/Roaming/.minecraft/mods/mcjtylib-1.10-2.2.0.jar!/cofh/api/energy/IEnergyProvider.class
* RF API class 'IEnergyReceiver' is loaded from: jar:file:/C:/Users/Raeuberbach/AppData/Roaming/.minecraft/mods/mcjtylib-1.10-2.2.0.jar!/cofh/api/energy/IEnergyReceiver.class
* RF API class 'IEnergyStorage' is loaded from: jar:file:/C:/Users/Raeuberbach/AppData/Roaming/.minecraft/mods/mcjtylib-1.10-2.2.0.jar!/cofh/api/energy/IEnergyStorage.class
* RF API class 'ItemEnergyContainer' is loaded from: jar:file:/C:/Users/Raeuberbach/AppData/Roaming/.minecraft/mods/mcjtylib-1.10-2.2.0.jar!/cofh/api/energy/ItemEnergyContainer.class
* RF API class 'TileEnergyHandler' is loaded from: jar:file:/C:/Users/Raeuberbach/AppData/Roaming/.minecraft/mods/mcjtylib-1.10-2.2.0.jar!/cofh/api/energy/TileEnergyHandler.class
* RF API class 'TileEnergyHandler' is loaded from: jar:file:/C:/Users/Raeuberbach/AppData/Roaming/.minecraft/mods/mcjtylib-1.10-2.2.0.jar!/cofh/api/energy/TileEnergyHandler.class
Launched Version: 1.10.2-forge1.10.2-12.18.1.2082
LWJGL: 2.9.4
OpenGL: AMD Radeon HD 6670 GL version 4.1.11251 Compatibility Profile Context, ATI Technologies Inc.
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.
Using VBOs: Yes
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x AMD Athlon(tm) II X4 645 Processor
OptiFine Version: OptiFine_1.10.2_HD_U_C4_pre
Render Distance Chunks: 8
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: null
OpenGlVersion: 4.1.11251 Compatibility Profile Context
OpenGlRenderer: AMD Radeon HD 6670
OpenGlVendor: ATI Technologies Inc.
CpuCount: 4