# Entity: SeaLion

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session
from app.api.db.database import get_db

router = APIRouter()

@router.get("/lions", response_model=List[SeaLionSchema])
async def get_all_sea_lions(
    db: Session = Depends(get_db)
):
    """Get all sea lions"""
    sea_lions = db.query(SeaLion).all()
    return sea_lions
```

This endpoint defines a GET route at `/lions` that retrieves all sea lion instances from the database using SQLAlchemy's `db.query(SeaLion).all()` method. The `response_model` parameter is set to `List[SeaLionSchema]`, assuming that a `SeaLionSchema` Pydantic model exists to define the response structure.

The main entity this endpoint works with is `SeaLion`. Note that you'll need to import the `SeaLion` model and `SeaLionSchema` from their respective modules.