【Material】
Synthetic Resin. The castle is made of high quality resin, which is absolutely safefor fresh water and no toxic leak, no color peeling. Nice for your lovely fish and shrimp.

【Holes】
This sunken ship has space inside along with holes which makes a great hiding space for tiny fish. However, the openings are not very big though. This would not work for a well rounded fish.

【Betta-like】
Little neon tetras can go through it. Fish love this especially sucker fish. They hide from parrot fish. And baby pleco / rainbow shark/ guppy fry / panda loach / chili rasboras / dwarf catfish / shrimp have no problem swimming through and hiding out in it.